{"id":47216,"date":"2026-10-30T13:05:22","date_gmt":"2026-10-30T11:05:22","guid":{"rendered":"https:\/\/mytankscape.com\/?p=47216"},"modified":"2026-10-30T13:06:11","modified_gmt":"2026-10-30T11:06:11","slug":"red-vampire-crab-paludarium-guide","status":"publish","type":"post","link":"https:\/\/mytankscape.com\/en\/red-vampire-crab-paludarium-guide\/","title":{"rendered":"Red Vampire Crab Paludarium Guide: Setup, Care and Feeding"},"content":{"rendered":"<div class=\"mts-article\">\nRed Vampire Crabs are the easiest way to turn a glass box into a tiny living jungle. They are only a few centimeters across, glow purple-red against green moss, stare out with bright yellow eyes, and spend their evenings climbing roots and picking at the leaf litter. Give them the right paludarium, half land and half water, and they will even breed for you.<\/p>\n<div class=\"mts-summary\">\n<strong>Quick answer:<\/strong> Red Vampire Crabs (<em>Geosesarma<\/em> sp.) are small <strong>freshwater, mostly land-dwelling crabs<\/strong> that need a <strong>paludarium<\/strong>, not a normal aquarium. Plan on <strong>about 60\u201370% land and 30\u201340% shallow fresh water<\/strong> in a tank of <strong>around 40\u201360 liters<\/strong> for a small group. Keep it at <strong>24\u201328\u00b0C<\/strong> with <strong>roughly 70\u201380% humidity<\/strong>, use dechlorinated water, feed small amounts of varied food every day or two, and fit a <strong>tight lid<\/strong>, because they are expert escape artists. A good starting group is one male with two or three females.\n<\/div>\n<h2 id=\"toc\">Table of Contents<\/h2>\n<ul class=\"mts-checklist\">\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#basics\">Red Vampire Crabs at a Glance<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#why\">Why a Paludarium, Not an Aquarium<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#tank\">Tank Size and the Escape-Proof Lid<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#build\">Building the Paludarium Step by Step<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#climate\">Temperature, Humidity and Water<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#plants\">Plants and Moss That Survive Crabs<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#cleanup\">The Bioactive Cleanup Crew<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#feeding\">Feeding Red Vampire Crabs<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#group\">Males, Females and Group Size<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#molting\">Molting and Breeding<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#tankmates\">Can They Live With Fish or Shrimp?<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#mistakes\">Common Mistakes<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"#faq\">FAQ<\/a><\/li>\n<\/ul>\n<h1>Red Vampire Crab Paludarium Guide: Setup, Care and Feeding<\/h1>\n<h2 id=\"basics\">Red Vampire Crabs at a Glance<\/h2>\n<div style=\"overflow-x:auto;\">\n<table style=\"border-collapse:collapse;width:100%;min-width:440px;\">\n<thead>\n<tr>\n<th style=\"border:1px solid #cbd5e1;padding:8px;text-align:start;\">Fact<\/th>\n<th style=\"border:1px solid #cbd5e1;padding:8px;text-align:start;\">Detail<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Scientific name<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\"><em>Geosesarma<\/em> sp.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Origin<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Rainforest streams and forest floor in Indonesia (Java and nearby islands)<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Size<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Body about 2\u20133 cm; around 5 cm including legs<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Lifespan<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">About 2 years, sometimes a little longer<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Water type<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Fresh water only; no salt needed at any life stage<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Activity<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Most active at dusk and at night; shy at first<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Care level<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Beginner-friendly once the paludarium is set up correctly<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Despite the name, they do not drink blood. &#8220;Vampire&#8221; comes from the glowing yellow eyes against a dark purple-red body. They are peaceful with people and are best enjoyed as display animals, not pets to handle.<\/p>\n<div class=\"mts-product-callout\">\n<strong>Available now:<\/strong> we stock live <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/red-vampire-crab-geosesarma-sp\/\">Red Vampire Crabs (Geosesarma sp.)<\/a> at 2\u20133 cm. Set up and settle the paludarium first, then bring them home.\n<\/div>\n<h2 id=\"why\">Why a Paludarium, Not an Aquarium<\/h2>\n<p>A paludarium is a tank that combines a land section and a water section in one enclosure. Red Vampire Crabs breathe air and spend most of their time on land, climbing and digging. They visit the water to drink, soak and keep their gills moist. <strong>In a fully flooded aquarium they can drown<\/strong>, so a normal fish tank is not an option.<\/p>\n<p>The upside is that a crab paludarium is one of the most beautiful setups you can build: moss-covered wood, small tropical plants, a shallow pool and a misty atmosphere, all in a tank that fits on a desk. If you have ever built a terrarium, you already know half of what you need. Our <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/moss-for-terrariums-paludariums-guide\/\">guide to moss in terrariums and paludariums<\/a> covers the planting side in more depth.<\/p>\n<h2 id=\"tank\">Tank Size and the Escape-Proof Lid<\/h2>\n<p>For a starting group of three or four crabs, a tank of <strong>around 40\u201360 liters<\/strong> works well. A footprint of about 45 \u00d7 30 cm or 60 \u00d7 30 cm gives enough land to set up a few hiding spots, and a height of 30\u201340 cm leaves room for wood to climb. Floor space matters more than height, because the crabs live mostly on the ground and the lower branches.<\/p>\n<div class=\"mts-warning\">\n<strong>Lid first, crabs second.<\/strong> Red Vampire Crabs climb silicone seams, filter tubes, cables and plant roots, and they squeeze through surprisingly small gaps. Use a fitted glass or mesh lid, seal cable holes with foam or tape, and check every gap before you add the animals. An escaped crab dries out and dies within hours.\n<\/div>\n<ul class=\"mts-checklist\">\n<li><strong>Ventilation:<\/strong> a small mesh strip in the lid stops the air going stale while still holding humidity.<\/li>\n<li><strong>Front access:<\/strong> a tank with a front-opening door or a split lid makes misting and feeding easier.<\/li>\n<li><strong>Custom sizes:<\/strong> paludariums often need a lower front glass or a built-in water section. Our team builds <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/custom-built-aquarium\/\">custom aquariums<\/a> to your exact size.<\/li>\n<\/ul>\n<h2 id=\"build\">Building the Paludarium Step by Step<\/h2>\n<p>The goal is a land area that stays damp but never waterlogged, and a shallow pool the crabs can walk in and out of without effort.<\/p>\n<h3>1. Divide land and water<\/h3>\n<p>Plan roughly <strong>60\u201370% land and 30\u201340% water<\/strong>. You can build a sloping bank where the substrate runs gently down into the water, or use stones and silicone to make a low wall with a ramp. Keep the water <strong>shallow, about 3\u20136 cm deep<\/strong>, and make sure every edge has an easy way out: a sloping stone, a root or a mat of moss. Crabs must never be trapped in the water.<\/p>\n<h3>2. Drainage layer<\/h3>\n<p>Under the land section, add 3\u20135 cm of a coarse drainage layer such as <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/lava-volcanic-rocks\/\">lava rock<\/a>. Excess water collects here instead of turning the soil into mud, which prevents rot and bad smells. Cover it with a piece of fine mesh so the soil does not wash down into the gaps.<\/p>\n<h3>3. Soil and leaf litter<\/h3>\n<p>On top of the mesh, add 5\u20138 cm of a loose, moisture-holding mix: a terrarium soil or coco fiber blended with some <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/sphagnum-moss\/\">sphagnum moss<\/a>. The crabs love to dig small burrows, so give them depth. Finish with a layer of dry leaves (oak or catappa leaves are popular). Leaves give the crabs cover, food for the cleanup crew and a natural look.<\/p>\n<h3>4. Hardscape and hides<\/h3>\n<p>Add a piece of driftwood or a root that reaches from the water up onto the land, and a few stones such as <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/dragon-stones-1-kg\/\">dragon stone<\/a> to create caves and ledges. Each crab should have at least one hiding place of its own: cork bark, half coconut shells, stacked stones or hollow wood all work. Our article on <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/using-driftwood-and-rocks-to-build-a-natural-aquascape\/\">using driftwood and rocks in a natural scape<\/a> explains how to place hardscape so it looks natural and stays stable.<\/p>\n<h3>5. Plant, mist and wait<\/h3>\n<p>Plant the land, attach moss to the wood, fill the water section with dechlorinated water and mist the whole tank. Then let it run for <strong>one to two weeks<\/strong> before adding crabs. This gives plants time to root, lets you check that humidity and temperature stay steady, and allows a little biofilm to form in the water section.<\/p>\n<div class=\"mts-tip\">\n<strong>Tip:<\/strong> keep the water section clean with a small sponge filter or by changing part of the water every few days. In a shallow pool, a regular partial change is often simpler than a filter. If you do use a filter, cover the intake with sponge and secure the tubing so it cannot become an escape ladder.\n<\/div>\n<h2 id=\"climate\">Temperature, Humidity and Water<\/h2>\n<div style=\"overflow-x:auto;\">\n<table style=\"border-collapse:collapse;width:100%;min-width:440px;\">\n<thead>\n<tr>\n<th style=\"border:1px solid #cbd5e1;padding:8px;text-align:start;\">Parameter<\/th>\n<th style=\"border:1px solid #cbd5e1;padding:8px;text-align:start;\">Target<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Air and water temperature<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">24\u201328\u00b0C<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Humidity<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">About 70\u201380%<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Water<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Fresh, dechlorinated, no salt<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">pH<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Around neutral, about 6.5\u20137.5<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Water depth<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:8px;\">Shallow, about 3\u20136 cm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><strong>Humidity<\/strong> is the number most beginners get wrong. Mist the tank once or twice a day with dechlorinated water, and keep a small hygrometer inside so you are not guessing. The glass should look slightly misted, but water should not pool on the land. An <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/mist-maker-ultrasonic-fog-generator\/\">ultrasonic fog maker<\/a> placed in the water section adds a beautiful rainforest mist and helps hold humidity, but run it on a timer for short periods rather than all day, or the land becomes soggy.<\/p>\n<p><strong>Temperature:<\/strong> in a Cairo summer most rooms already sit in the right range, so watch for overheating rather than cold. Keep the tank out of direct sun and away from closed, hot rooms. In winter, many homes drop below 22\u00b0C at night. A small heater in the water section, such as the <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/xilong-xl601-usb-mini-aquarium-heater-15w\/\">Xilong XL-601 USB mini heater<\/a>, warms the pool and the air above it. Make sure the water is deep enough to cover the heater fully, as its instructions require. Our <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/aquarium-heater-guide-sizing-placement-safety\/\">aquarium heater guide<\/a> covers safe placement.<\/p>\n<div class=\"mts-warning\">\n<strong>Never use tap water untreated.<\/strong> Chlorine harms crabs just as it harms fish. Treat all water for the pool and the spray bottle with a <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/chlorine-remover-granules-250g\/\">chlorine remover<\/a>, or use dechlorinated water you keep ready in a bottle.\n<\/div>\n<h2 id=\"plants\">Plants and Moss That Survive Crabs<\/h2>\n<p>Red Vampire Crabs pick at soft leaves and dig around roots, so choose sturdy plants that like humidity and moderate light.<\/p>\n<ul class=\"mts-checklist\">\n<li><strong>Fittonia (nerve plant):<\/strong> loves high humidity and adds color. Try <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/fittonia-albivenis-red\/\">Fittonia &#8216;Red&#8217;<\/a> next to green moss for contrast.<\/li>\n<li><strong>Anubias and Java Fern:<\/strong> tough leaves that crabs leave alone. Tie them to wood at the water line so their roots reach the water. <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/anubias-nana-petite\/\">Anubias Nana Petite<\/a> suits small tanks, and <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/java-fern\/\">Java Fern<\/a> grows happily half in and half out of water.<\/li>\n<li><strong>Land moss:<\/strong> <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/cushion-moss\/\">Cushion Moss<\/a> and <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/forest-moss-50g\/\">Forest Moss<\/a> carpet the land and hold moisture.<\/li>\n<li><strong>Water-edge moss:<\/strong> <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/christmas-moss\/\">Christmas Moss<\/a> on stones or wood at the water line softens the edge and gives the crabs grip when climbing out.<\/li>\n<li><strong>Hydrocotyle tripartita:<\/strong> grows both submerged and emersed, and spreads nicely along the bank.<\/li>\n<\/ul>\n<p>For moss that stays green rather than turning brown, see our <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/terrarium-moss-selection-display-care-guide\/\">terrarium moss care guide<\/a>. A simple LED light on an 8\u201310 hour timer is enough for these plants; the crabs themselves need no special lighting.<\/p>\n<h2 id=\"cleanup\">The Bioactive Cleanup Crew<\/h2>\n<p>A bioactive paludarium uses tiny helpers to eat leftover food, mold and dead leaves before they rot. It is the single easiest way to keep a crab tank clean and smelling fresh.<\/p>\n<ul class=\"mts-checklist\">\n<li><strong>Springtails:<\/strong> very small insects that eat mold and fungus. A <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/pinecone-with-live-springtails\/\">pinecone with live springtails<\/a> placed on the soil spreads a colony through the tank.<\/li>\n<li><strong>Isopods:<\/strong> <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/woodlouse-isopods\/\">woodlice (isopods)<\/a> break down leaf litter and leftover food deeper in the soil.<\/li>\n<\/ul>\n<p>The crabs may hunt a few of them, and that is fine; it is natural extra protein. Add the cleanup crew during the one-to-two-week settling period so the colonies are established before the crabs arrive.<\/p>\n<h2 id=\"feeding\">Feeding Red Vampire Crabs<\/h2>\n<p>These crabs are omnivores and scavengers. In the wild they eat small insects, fallen fruit and decaying plant matter, so variety matters more than any single food.<\/p>\n<ul class=\"mts-checklist\">\n<li><strong>Staple:<\/strong> a sinking crab or invertebrate food such as <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/hikari-crab-cuisine\/\">Hikari Crab Cuisine<\/a>, a few pellets per crab.<\/li>\n<li><strong>Protein:<\/strong> frozen bloodworms or brine shrimp, or small live insects such as fruit flies, once or twice a week.<\/li>\n<li><strong>Plant food:<\/strong> small pieces of blanched zucchini, spinach or cucumber, and an occasional bite of banana or mango.<\/li>\n<li><strong>Insect-based pellets:<\/strong> <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/fluval-bug-bites-tropical-granules-100g\/\">Fluval Bug Bites<\/a> make a good change from the staple.<\/li>\n<\/ul>\n<p>Feed a small pinch <strong>every day or every other day<\/strong>, ideally in the evening when the crabs are active. Place food on a flat stone or a small dish on land so it is easy to find and easy to remove. Take out anything uneaten after 24 hours to prevent mold.<\/p>\n<h2 id=\"group\">Males, Females and Group Size<\/h2>\n<p>Males and females are easy to tell apart once you know what to look for. Look at the flap under the body: <strong>males have a narrow, triangular flap<\/strong>, while <strong>females have a wide, rounded flap<\/strong> that covers most of the underside, where they carry eggs. Males also tend to have larger, more colorful claws.<\/p>\n<p>Males are territorial with each other. Keep <strong>one male with two or three females<\/strong> in a 40\u201360 liter tank. If you want two males, give them a larger tank with plenty of hides and visual barriers so they each have their own corner.<\/p>\n<h2 id=\"molting\">Molting and Breeding<\/h2>\n<p>Like all crabs, Red Vampire Crabs grow by shedding their shell. Before a molt, a crab hides and eats less for a few days. Afterwards you may find what looks like a dead crab: it is usually the empty shell. <strong>Leave the old shell in the tank<\/strong>; the crab often eats it to recover calcium. Do not handle or disturb a freshly molted crab, as its new shell stays soft for a few days.<\/p>\n<p>Breeding is one of the most rewarding things about this species. Unlike many crabs that need salt water for larvae, <em>Geosesarma<\/em> females carry their eggs under the abdomen and release <strong>tiny, fully formed baby crabs<\/strong> directly into fresh water. A berried female hides more than usual, so give her space and keep humidity steady. The babies hide in moss and leaf litter and eat biofilm and crumbs, and the adults may eat some of them, so a dense moss carpet improves survival.<\/p>\n<h2 id=\"tankmates\">Can They Live With Fish or Shrimp?<\/h2>\n<p>Most keepers give Red Vampire Crabs their own tank, and that is our recommendation. Their water section is too shallow for most fish, and the crabs are quick hunters at night.<\/p>\n<ul class=\"mts-checklist\">\n<li><strong>Shrimp:<\/strong> adult cherry shrimp may survive, but baby shrimp are likely to be eaten. Our <a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shrimp-keeping-101-a-beginners-guide-to-freshwater-shrimp\/\">shrimp keeping guide<\/a> covers shrimp-only tanks instead.<\/li>\n<li><strong>Small fish:<\/strong> fish that stay near the surface in a larger water section can coexist, but sleeping fish near the bottom may be caught.<\/li>\n<li><strong>Other crab species:<\/strong> do not mix species; they fight and may hybridize.<\/li>\n<\/ul>\n<h2 id=\"mistakes\">Common Mistakes<\/h2>\n<ul class=\"mts-checklist\">\n<li><strong>Using a normal aquarium:<\/strong> crabs need land and can drown without it.<\/li>\n<li><strong>Gaps in the lid:<\/strong> the most common way to lose crabs.<\/li>\n<li><strong>Deep water with no way out:<\/strong> keep the pool shallow with easy ramps.<\/li>\n<li><strong>Letting the tank dry out:<\/strong> low humidity causes failed molts.<\/li>\n<li><strong>Soggy, rotting soil:<\/strong> always use a drainage layer and do not over-run the fogger.<\/li>\n<li><strong>Untreated tap water:<\/strong> dechlorinate everything, including spray water.<\/li>\n<li><strong>Overfeeding:<\/strong> leftover food grows mold quickly in a humid tank.<\/li>\n<li><strong>Too many males:<\/strong> one male per small group keeps the peace.<\/li>\n<\/ul>\n<h2 id=\"faq\">Frequently Asked Questions<\/h2>\n<div class=\"mts-faq\">\n<strong>Do Red Vampire Crabs need salt water?<\/strong><br \/>No. They are freshwater crabs at every stage of life, and their babies hatch fully formed in fresh water.\n<\/div>\n<div class=\"mts-faq\">\n<strong>Can Red Vampire Crabs live in a normal aquarium?<\/strong><br \/>No. They spend most of their time on land and can drown in a fully flooded tank. They need a paludarium with land and shallow water.\n<\/div>\n<div class=\"mts-faq\">\n<strong>How big do Red Vampire Crabs get?<\/strong><br \/>The body reaches about 2\u20133 cm, and around 5 cm including the legs.\n<\/div>\n<div class=\"mts-faq\">\n<strong>How many Red Vampire Crabs can I keep together?<\/strong><br \/>One male with two or three females in a 40\u201360 liter paludarium is a good start.\n<\/div>\n<div class=\"mts-faq\">\n<strong>What do Red Vampire Crabs eat?<\/strong><br \/>A varied diet: crab pellets, frozen bloodworms, small insects, blanched vegetables and occasional fruit, fed every day or two.\n<\/div>\n<div class=\"mts-faq\">\n<strong>Why is my crab hiding all the time?<\/strong><br \/>They are naturally shy and most active at night. A crab that hides for several days may also be getting ready to molt or carrying eggs.\n<\/div>\n<div class=\"mts-faq\">\n<strong>Can Red Vampire Crabs live with shrimp?<\/strong><br \/>Adult shrimp sometimes survive, but baby shrimp are likely to be eaten. A species-only tank is safest.\n<\/div>\n<h2>Conclusion<\/h2>\n<p>A Red Vampire Crab paludarium is a small tank with a big personality: a misty corner of rainforest on your desk, with jewel-colored crabs climbing through the moss at night. Get the lid, the humidity and the shallow water right, and you will have a thriving, breeding colony that is genuinely easy to look after. If you would like help choosing a tank or planning the layout, our team is happy to help.<\/p>\n<h3>Recommended Products<\/h3>\n<ul class=\"mts-checklist\">\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/red-vampire-crab-geosesarma-sp\/\">Red Vampire Crab (Geosesarma sp.)<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/hikari-crab-cuisine\/\">Hikari Crab Cuisine<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/mist-maker-ultrasonic-fog-generator\/\">Ultrasonic Fog Maker<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/pinecone-with-live-springtails\/\">Pinecone with Live Springtails<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/cushion-moss\/\">Cushion Moss<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shop\/sphagnum-moss\/\">Sphagnum Moss<\/a><\/li>\n<\/ul>\n<h3>Related Articles<\/h3>\n<ul class=\"mts-checklist\">\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/moss-for-terrariums-paludariums-guide\/\">The Complete Guide to Using Moss in Terrariums and Paludariums<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/terrarium-moss-selection-display-care-guide\/\">Terrarium Moss: A Guide to Selection, Display, and Care<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/using-driftwood-and-rocks-to-build-a-natural-aquascape\/\">Using Driftwood and Rocks to Build a Natural Aquascape<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/shrimp-keeping-101-a-beginners-guide-to-freshwater-shrimp\/\">Shrimp Keeping 101: A Beginner&#8217;s Guide to Freshwater Shrimp<\/a><\/li>\n<li><a class=\"mts-link\" style=\"color:#1a56db;text-decoration:underline;font-weight:600;font-size:1.03em;\" href=\"https:\/\/mytankscape.com\/en\/nano-and-pico-aquarium-setup-guide\/\">Nano and Pico Aquarium Setup Guide<\/a><\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Red Vampire Crabs are the easiest way to turn a glass box into a tiny living jungle. They are only<\/p>\n","protected":false},"author":298,"featured_media":47217,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"wpai_generated_summary":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"mts_hero_image_prompt":"","mts_hero_image_alt":"","_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[891],"tags":[1359,1349,1345,1347,1355,1357,1351,1353,785,1343,1179,1169],"class_list":["post-47216","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aquascaping-design","tag-beginner-guide","tag-bioactive-terrarium","tag-freshwater-crabs","tag-geosesarma","tag-humidity","tag-invertebrates","tag-isopods","tag-moss","tag-paludarium","tag-red-vampire-crab","tag-springtails","tag-terrarium"],"jetpack_sharing_enabled":true,"jetpack_likes_enabled":false,"jetpack-related-posts":[],"jetpack_featured_media_url":"https:\/\/mytankscape.com\/wp-content\/uploads\/2026\/10\/red-vampire-crab-paludarium-hero.png","_links":{"self":[{"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/posts\/47216","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/users\/298"}],"replies":[{"embeddable":true,"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/comments?post=47216"}],"version-history":[{"count":2,"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/posts\/47216\/revisions"}],"predecessor-version":[{"id":47223,"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/posts\/47216\/revisions\/47223"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/media\/47217"}],"wp:attachment":[{"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/media?parent=47216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/categories?post=47216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mytankscape.com\/en\/wp-json\/wp\/v2\/tags?post=47216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}