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Atlas / Library / Sesarmidae / Vampire Crab (assorted Geosesarma)
IntermediateNocturnal · sleeping now
Sesarmidae

Vampire Crab (assorted Geosesarma)

Geosesarma sp. (e.g. dennerle, 'red devil')ปูแวมไพร์

Narrower than the page we cite. The source we cite, read on 10 Aug 2026, gives a wider range than the one above. The narrowing is ours and nobody here has written down why. aquariumsource.com

Photograph: Taxon Expeditions · CC BY-SA

Photographed by an observer on iNaturalist and published under a Creative Commons licence; the photographer and the licence are named under the image. It is not an animal of ours, and no animal was handled by us to produce it.

14:00
Day

Drag the sun. Vampire Crab (assorted Geosesarma) is nocturnal, so what it is doing changes with the light.

Semi-terrestrial · temperate · humidFrom the sheet: 24–28°C, humidity 75%

The way of life is written in this sheet, word for word. The climate words summarise the two figures above them, they do not add to them.

National law is not global, and we hold no national wildlife law for any country, Thailand included. Check your own authority before buying or selling.

Back to the globe My keep

https://keepr.pet/husbandry/en/geosesarma-sp-e-g-dennerle-red-devil

‹ All husbandry guides
Temperature24–28 °C
Humidity75 %
Diet1–2 days

The numbers

Temperature

152025303540 °C
24–28°Ambient

One ambient band, 24–28°C. This sheet states no warm side, no cool side and no night figure, so none are shown. Same scale on every sheet here, so two species compare by eye.

The sheet states24-28°C

Humidity

75%Target RH

The sheet states75%+

UVB

Not needed for this species

Stated in the sheet, not inferred.

The sheet statesno proven requirement at genus/hobby level; some keepers optionally provide low-level UVB but it is not established as necessary

Enclosure
Paludarium ~40 L, ~80% land : 20% freshwater

Identity

Adult size

1.75 m2–2.5 cm
1520100400 cm
2–2.5 cmNose to tail, adult

The size the sheet states for a grown animal.

Why

Two drawings, because they answer two questions. The silhouette is at true scale against a 1.75 m person: it says how big this animal actually is, which no number does for someone who has never seen one. The bar under it is logarithmic and shared by every sheet here, so a 2 cm isopod and a 4 m python both stay readable on the same axis and two species can be compared at a glance.

Order / Family
Decapoda
IUCN / CITES
Not evaluated; many undescribed; wild-collected
Difficulty
Intermediate
Commonality
Popular, colourful SEA paludarium crab
Adult size
~2–2.5 cm carapace (leg span ~5 cm)
Lifespan
2–3 yrs
Growth rate
Moderate
Activity & niche
Semi-terrestrial; nocturnal; NOT brackish: freshwater/terrestrial
Temperament
Shy, secretive; males territorial
Venom / defense
Harmless to humans; can give a small pinch

Enclosure and conditions

Temperature
24–28°C
Humidity
75%+
Min. enclosure
Paludarium ~40 L, ~80% land : 20% freshwater
Substrate
Coco peat + sphagnum, 5–8 cm land; sand near water
Hides / decor / water
Cork bark, driftwood, live plants (ferns, creeping fig); shallow FRESHWATER pool (they drown in deep water)

What your climate adds

This sheet states a range to hold. Your local climate decides how much work holding it is. Pick the nearest city: nothing is sent anywhere, the choice stays in this browser.

Diet

Feeding rhythm

every 1–2 dAs the sheet states
28Meals in 28 days

Twenty-eight days, one row. Each band is a meal window.

Why

The windows widen as they go because the interval is a range: four meals after a 10–14 day cycle land anywhere between day 40 and day 56.

The sheet statesBloodworms, dried shrimp, insects, veg, fish flake, leaf litter · Every 1–2 days

Staple food
Bloodworms, dried shrimp, insects, veg, fish flake, leaf litter
Feeding frequency
Every 1–2 days
Supplements
Cuttlebone / calcium for molting; some protein variety

Behaviour and handling

HandlingMinimal; may pinch: best observed, not handled
CommunalYes – keep ~1 male : 2+ females; provide hides to reduce aggression
Defense / stress signsHiding, claw display, refusing food, failed molts

Reproduction

Life course

Day 0Hatch
2–3 yrLifespan in care
2 yrMinimum commitment
Sexual maturityNot in our data

Read from the lifespan and maturity the sheet states, for animals in care and not in the wild.

Why

The minimum commitment is the low end of that lifespan, and the reproductive window is what is left after maturity: both are subtractions on stated figures, not figures of their own.

Reproduction
Direct development: female broods eggs, releases tiny fully-formed crabs (breedable!)

Common health problems

Common health issues
SignsFailed molts (low humidity/calcium), drowning in deep water, aggression
Red flags / quarantine
SignsMissing limbs, lethargy; quarantine wild-caught imports

Good to know

  • Named for glowing yellow eyes, not diet; unusually, they breed in freshwater with no larval sea stage.

What it needs

A thermometerbecause temp24-28°C
A hygrometerbecause humidity75%+
No UVB: the sheet states none is neededbecause uvbno proven requirement at genus/hobby level; some keepers optionally provide low-level UVB but it is not established as necessary
Not stated: The size of the enclosurethis sheet describes the enclosure without a figure: « Paludarium ~40 L, ~80% land : 20% freshwater »

Every line above is deduced from a value this sheet states, and names which one. Nothing here is a general recommendation. What the sheet does not state is listed too, rather than left out: a kit that looks complete is worse than one that names its gap.

Sources

Others in this group

What this sheet states

100%
TemperatureHumidityEnclosure sizeActivityOriginDietSourcesUVB

Every field this product runs on is stated here. That is not a claim that the values are right: it says what the sheet states, not whether it is true. Whether a human has read it is the badge at the top of this page.

UVB is measured but does not count: it is absent from 421 of 678 sheets, and on most of them that is not a gap, since a nocturnal snake's sheet has no reason to state a UV index. Counting it would call the library incomplete without cause.