Orange Vampire Crab (Geosesarma sp.)

Orange vampire crab at a glance

Orange Vampire Crab (Geosesarma sp.) is a small, semi-terrestrial crab sold under an orange trade name within the genus Geosesarma. The exact species has not been identified, so the care advice here follows the genus Geosesarma and its care group. The World Register of Marine Species lists Geosesarma as an accepted genus in the family Sesarmidae, and crabs in the genus are known in the UK trade as vampire crabs.

Vampire crabs reach the UK under a range of colour names, and many of those names, this one included, are trade labels rather than scientific species. Colour alone cannot tell you which Geosesarma species a crab belongs to, and two differently coloured vampire crabs may or may not be the same species. That is why this listing names only the genus and plans care around what the whole genus needs.

The most important thing to know before ordering is that this is a land-living crab, not an aquarium animal. It needs a secure, humid paludarium: an enclosure that is mostly moist land, with a shallow pool of clean freshwater it can walk into and out of easily. In a fully aquatic tank it would have nowhere to live the way it naturally does, so if you already keep fish, plan a separate enclosure for this crab.

Vampire crabs burrow and shelter under cover, so a well-planted enclosure with leaf litter, moss and cork bark gives it the security it needs, while still letting you watch it forage when it comes out, its orange claws showing clearly against dark soil and leaf litter.

What you receive and the photograph

One purchase supplies one live crab, graded at about 2–3 cm for dispatch. That grade describes the crab you receive, not a promise about how large it will become. For scale, Wikipedia's summary of the genus describes Geosesarma crabs as typically less than 10 mm across the carapace, the hard shell of the body. Carapace width measures the shell alone, so it is not directly comparable with the dispatch grade. There is only one size, so the only choice on this page is how many crabs you order.

Sex is guaranteed only when the selected option explicitly states male or female. This Orange Vampire Crab listing has no sex-guaranteed option. Colour and the photograph give no reliable clue to which sex you will receive.

Gallery images have been digitally enhanced to improve image quality. Natural colour, pattern, size and maturity can vary between live animals.

The photograph shows a crab with bright orange claws and eyestalks, pale eyes, a dark carapace and deep purple legs. Treat it as a guide to the colouring of this trade form rather than a picture of the individual crab you will receive.

If you are comparing small crustaceans, our shrimp and crustacean range shows the other animals we sell in this group. The shrimp there are fully aquatic, so their housing is very different from a vampire crab's, and each needs its own plan.

Why this crab needs a paludarium

Wikipedia's genus summary describes Geosesarma as small freshwater or terrestrial crabs that live and reproduce on land, with the larval stages completed inside the egg. In practice that means there is no free-swimming larval stage: these crabs are adapted to life around damp ground, not open water.

A specialist Geosesarma care sheet from The Tye-Dyed Iguana describes the crabs spending most of their time on land while still using water. The Los Angeles Zoo account of its purple vampire crab, Geosesarma dennerle, describes a warm, humid, thickly planted setting on wet soil beside fresh water, with the crabs burrowing and scavenging. That zoo account covers one named species rather than this orange trade form, but it matches the picture for the genus: land first, with water close by.

A paludarium gives the crab everything that picture asks for:

• Land to live on: moist substrate for walking, foraging and burrowing, which is where the crab spends most of its time.
• Humidity: an enclosed, damp environment so the crab does not dry out between visits to the water.
• Accessible freshwater: a shallow area it can enter and leave at will, rather than deep water it has to swim in.
• Cover: plants, leaf litter, moss and bark so it can shelter and feel secure.

Wikipedia records the genus from India, Indonesia, Malaysia, Thailand, the Philippines, the Solomon Islands and Hawaii. Where this orange trade form was originally collected is not recorded, so plan its care from the genus-wide needs above rather than from the climate of one particular island.

Building a secure enclosure

Start with security. Specialist guidance for Geosesarma stresses an escape-resistant enclosure, and a crab that gets out of a humid set-up into a dry room is at risk of drying out. Fit a tight lid and close off the gaps around cables, pipes and hinges before the crab arrives.

Then plan the layout around land, with water as one feature within it:

• Land area: most of the floor, built up with deep substrate so the crab can dig and forage.
• Water area: a shallow pool or dish of clean freshwater, set into the land so it is easy to reach.
• Easy exits: gentle slopes of substrate, flat stones or pieces of wood leading out of the water, so the crab can always climb back onto land.
• Planting: plenty of live plants on the land, which help hold humidity and give cover.
• Hides: cork bark, leaf litter and other shelters spread across the enclosure, not only in one corner.

Floor space is what the crab uses: it needs room for deep substrate, several hides, plants and a water area side by side. A layout that is all water with a small island, or all bare land with a bowl in the corner, misses the point of a paludarium.

Set the enclosure up and let it run before the crab arrives. That gives the plants time to settle, the substrate time to reach an even dampness, and you time to check that humidity and warmth hold steady from one day to the next.

What to have ready before ordering

A vampire crab should go straight into an enclosure that is already running. Before you order, gather:

• An enclosure with a tight-fitting lid, with every gap around cables and hinges closed off.
• A soil and sand mix deep enough to burrow into, plus moss, leaf litter and pieces of cork bark.
• Live plants for cover and humidity.
• A shallow water dish or pool with firm, easy exits.
• A tap water conditioner, and a test kit if you plan to filter the water area.
• A thermometer and a hygrometer, so you can see temperature and humidity rather than guess them.
• A small mister or watering can kept for dampening the land with dechlorinated water.
• Prepared crab food, with fruit and greens to hand for variety.
• Nets, jugs and containers kept only for the paludarium, away from any copper-based fish treatments.

Run the set-up before ordering so you can see the land stay damp and the temperature hold steady. It is far easier to adjust an empty enclosure than to rebuild one around a newly arrived crab.

Substrate, moss, leaf litter and hides

Substrate is the crab's main living space, so it deserves the most thought. The Tye-Dyed Iguana care sheet describes soil or sand with moss on top, under leaf litter or cork bark, and the Los Angeles Zoo describes its vampire crabs burrowing into wet soil.

Build the substrate deep enough for burrowing and keep it moist rather than dry and dusty. Keep the land beside the water area firm, so the edges of the pool do not collapse as the crab digs.

Give more than one hide even for a single crab. Spreading shelters across damp and slightly drier parts of the land lets the crab choose where to rest, and it means you are not forced to disturb its only refuge whenever you tidy the enclosure.

Leaf litter breaks down over time, which is part of its value as a natural surface, but replace any that becomes mouldy or fouled with food. Moss that stays wet and smells stale should be refreshed too.

Humidity, warmth and stable conditions

The care sources for these crabs describe a humid setting, and the Los Angeles Zoo describes its vampire crabs in warm, humid conditions. The aim is an enclosure where the land stays damp and the air stays moist, with conditions that stay steady from day to day.

• Humidity: a lid, live plants, moss and damp substrate all help hold moisture. A hygrometer shows whether the enclosure is staying humid rather than slowly drying out.
• Warmth: keep the enclosure warm and steady, and check it with a thermometer rather than guessing. Any heating should be gentle and should not dry the land out.
• Stability: avoid sudden swings. Keep the enclosure away from draughts, radiators and direct sun from a window.
• Dampening: when the land starts to dry, moisten it with dechlorinated water rather than flooding it; the aim is damp soil and moss, not standing water across the land.
• Fresh air: a humid enclosure still needs regular checks for stale, mouldy patches, which usually mean food or plant material needs removing.

For the water, OATA's care sheet for crayfish and freshwater crabs, which expressly includes vampire crabs, gives 22–27 °C, pH 7.0–8.0 and 8–18 °dH. Those figures are broad guidance for the whole crayfish and freshwater-crab group, not a measured optimum for this orange trade form, so use them as background for the water area rather than a precise target.

The water area

The crab visits the water rather than living in it, but that water still needs to be clean. OATA puts clean, tested water first for freshwater crabs, and the RSPCA's aquarium welfare guidance explains why: animals release ammonia, which is toxic, and only a working biological filter turns it into nitrite and then the safer nitrate.

A small unfiltered pool needs changing often, because waste builds up quickly in a little water. If you run a small filter in a larger water area, mature it first and test the water, just as you would for an aquarium.

The pool can be a shallow dish sunk into the substrate or a shaped water area within the enclosure. Either way, the crab should be able to stand in it and walk out without needing to swim, and the edges should be firm enough that digging does not wash substrate into the water. Siphon out debris when you change the water, and keep plants trimmed back so the easy exits stay open.

Our freshwater shrimp-keeping guide covers how to prepare, mature and test water for small invertebrates, and that preparation applies to the crab's water area too, even though the crab itself needs land rather than a full tank. If ammonia, nitrite, GH and KH are new to you, our guide to aquarium water parameters explains what each test tells you. Once you have readings for your tap water, the water parameter matcher lets you compare them with published ranges before you fill the pool.

Feeding a vampire crab

Vampire crabs are omnivorous scavengers. The Los Angeles Zoo describes its crabs scavenging on both animal and plant material, OATA recommends a varied diet of animal and plant foods for freshwater crabs, and the Tye-Dyed Iguana care sheet lists a mixed menu of prepared crab food, small animal foods, fruit and greens.

• Base food: a prepared crab food in small pieces the crab can pick up.
• Animal foods: small portions of animal-based foods to add variety.
• Fruit: small pieces offered occasionally, removed before they ferment or grow mould.
• Greens: leafy greens as part of the plant side of the diet.

Feed small amounts and put food on the land area or on a small dish, where leftovers are easy to spot. A crab this small eats very little, and uneaten food quickly spoils in a warm, humid enclosure, fouling the substrate and the water. Removing leftovers is as important as choosing the food.

Rotate the menu rather than relying on one item. If food is regularly left untouched, offer less rather than more, and keep checking the enclosure for hidden scraps under leaf litter or bark.

Copper and treatments

Crabs are invertebrates, and OATA advises using only invertebrate-safe, copper-free treatments around them. Copper appears in some fish medicines and other aquarium products, so read the label of anything that could reach the crab's water area.

• Keep copper-based fish medicines out of the enclosure and away from equipment you use for it.
• Use separate nets, jugs and buckets for the paludarium if you also treat fish tanks.
• Rinse your hands before working in the enclosure if you have handled fish treatments.
• If the crab seems unwell, check the basics first: humidity, warmth, clean water and whether anything containing copper could have reached it.

Prevention is the practical way to keep this crab healthy: clean water, fresh food and stable, humid conditions.

Arrival day

Every order is hand-packed by our team and sent in an insulated box, with a heat pack when the weather calls for it. A tracked, licensed live-animal courier carries the parcel, and you receive the tracking number and your confirmed Thursday or Friday delivery date by email. Someone needs to be at the address to receive it, because live animals cannot be left unattended. Our delivery and Live Arrival Guarantee page has the full terms.

The fish routine of floating a bag in an aquarium does not apply to a semi-terrestrial crab. Instead, work through these steps:

1. Before delivery day, have the paludarium ready: lid secure, land damp, hides in place and the water area filled with clean, dechlorinated water.
2. When the parcel arrives, film a continuous unboxing video every time: the sealed parcel with the outer box visible, the opening in one take, and the crab still inside its sealed transport container.
3. Open and inspect the parcel the same day it arrives.
4. Move the crab gently onto the land area near a hide, without adding the transport water to the enclosure.
5. If anything has gone wrong, contact us the same day with your order number and the video. WhatsApp is fastest, and we will arrange a replacement or refund.

The video comes first because it shows the parcel sealed and the crab undisturbed, which makes a claim quicker and fairer to settle; our licensed courier may also ask for continuous unboxing footage when we raise a claim with them.

Afterwards, observe closely but calmly. Because vampire crabs burrow and use hides, it is normal for a new crab to disappear from view. Resist digging it out to check on it; look instead for signs of activity, such as moved substrate or food that has been taken.

Settling in over the first weeks

A new crab may spend long stretches out of sight while it explores and digs in. That is normal for a burrowing animal, and patience is better than searching for it.

Signs that it is settling:

• Substrate moved or small burrows appearing near hides.
• Food taken from the dish or the land.
• The crab seen on land and at the water's edge at different times.
• The lid and enclosure still secure, with no sign of escape attempts succeeding.

Adjustments to make:

• If the land dries quickly, add moss or planting and check the lid for gaps that let moisture escape.
• If food is regularly left, offer smaller portions.
• If the water fouls quickly, change it more often or reduce how much food ends up near it.

Avoid rearranging the enclosure in the first weeks, so the hides the crab has chosen stay where it found them.

Daily and weekly routine

A paludarium needs a little attention most days and a tidy-up each week. Small, regular care keeps conditions stable and saves you from disturbing the crab with big clean-outs.

Every day or two

• Check that the lid is secure and no new gaps have opened.
• Look at the substrate and moss, and dampen the land if it is drying out.
• Remove leftover food, especially fruit and animal foods.
• Glance at the water area and replace it if it looks cloudy or fouled.

Every week

• Change or top up the water area with dechlorinated water, and test it if you run a filter.
• Clear mouldy leaf litter or fouled moss and add fresh material.
• Check the thermometer and hygrometer readings over several days rather than trusting one reading.
• Tidy plants that are overgrowing the water area or blocking the easy exits.

Work around the crab's hides rather than through them. Moving every piece of bark to find the crab each week undoes the security that makes it comfortable.

Handle the crab as little as possible. If you need to move it, for example while rebuilding part of the enclosure, guide it gently into a small container rather than picking it up, and return it to the land near a hide.

Fish and shared set-ups

OATA advises caution when keeping crabs with fish, and a vampire crab's needs pull in a different direction from most fish. The crab lives on land and visits shallow water; fish need a full body of water. A standard community aquarium does not give the crab the land it needs.

Some keepers build larger paludariums with a deeper water section, but that is a different project from keeping this crab well. If you are considering it, plan the enclosure around the crab first, keep the crab's land area generous and secure, and treat any fish as a separate responsibility with its own water-quality needs.

In any shared set-up, fish food and fish treatments also reach the crab's water, which makes copper-free treatment choices even more important. For most keepers the simplest and safest plan is a dedicated vampire crab enclosure. It lets you set humidity, water depth, food and cleaning routines entirely for the crab.

Keeping more than one crab

This listing supplies one crab per purchase. If you plan to keep more than one, give each crab its own hides and spread food across more than one spot, so that no individual has to compete for shelter or a meal.

• Hides: add extra cork bark, leaf litter and planting as numbers grow.
• Food: offer small portions in two or more places.
• Observation: watch for one crab being chased from shelters or food, and be ready to add cover or separate animals.

Other Geosesarma forms, such as the purple vampire crab, have their own care details and identities. Keep each listing's guidance with the crab it describes, and do not assume that two differently coloured vampire crabs are the same species. If you would prefer a vampire crab with a named species, the purple vampire crab, Geosesarma dennerle, is sold as a separate listing.

Vampire crab questions

Why does an Orange Vampire Crab need a paludarium rather than an aquarium?

Geosesarma crabs live and reproduce on land, and specialist keepers describe them spending most of their time out of the water. An Orange Vampire Crab therefore needs a secure, humid enclosure that is mostly moist land, with a shallow freshwater area it can walk into and out of, rather than a fully aquatic tank.

How do I give a vampire crab both land and clean freshwater?

Build most of the enclosure as moist, planted land and add a shallow water area with gentle slopes, stones or wood so the crab can climb out easily. Fill it with dechlorinated freshwater and keep it clean; OATA's guidance for freshwater crabs puts clean, tested water first.

What substrate and hides does an Orange Vampire Crab need?

A deep, moisture-retentive mix of soil and sand that it can burrow into, topped with moss and leaf litter, plus cork bark or similar cover. Dense planting helps the land stay humid and adds more places to shelter.

What does an Orange Vampire Crab eat?

It is an omnivorous scavenger. Offer a varied menu of prepared crab food, small animal-based foods, fruit and leafy greens in small amounts, and remove leftovers before they spoil.

Are copper medicines safe around vampire crabs?

No. OATA advises using only invertebrate-safe, copper-free treatments around crabs, so check the label of anything that could reach the water area and keep copper-based products away from the enclosure.

Can an Orange Vampire Crab live with fish?

OATA advises caution when crabs share space with fish, and this crab spends most of its life on land, so a dedicated paludarium planned around the crab is the better choice. A standard fish aquarium does not give it the land it needs.

Which species is the Orange Vampire Crab?

Its exact species has not been identified. It is sold under an orange trade name within the genus Geosesarma, so its care follows the genus and its care group rather than one named species.

How does the Orange Vampire Crab arrive alive in the UK?

It is hand-packed by our team and delivered by a tracked, licensed live-animal courier on a confirmed Thursday or Friday, so someone needs to be at home. Film a continuous unboxing video from the sealed parcel onwards, which is needed for any Live Arrival Guarantee claim, then move the crab gently onto the land of its prepared paludarium without adding the transport water.

Sources

• World Register of Marine Species: Geosesarma. Accepted genus and family placement.
• Wikipedia: Geosesarma. Genus summary: size, life on land and distribution.
• OATA: How to look after crayfish and freshwater crabs. UK trade-body guidance for the wider group, including vampire crabs.
• The Tye-Dyed Iguana: vampire crab (Geosesarma sp.) care sheet. Housing, substrate and diet for the genus.
• Los Angeles Zoo: vampire crab. Habitat and behaviour of Geosesarma dennerle.
• RSPCA: fish environment and filtration. General guidance on filters and the nitrogen cycle.
• Tropical Fish Co's delivery and Live Arrival Guarantee page, linked in the arrival section above.