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Atlas / Library / Grapsidae / Gray's Land Crab
IntermediateNocturnal · sleeping now
Grapsidae

Gray's Land Crab

Geograpsus grayiปูบก

Photograph: Ben Keen · CC0

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. Gray's Land Crab is nocturnal, so what it is doing changes with the light.

Burrowing · temperate · humidFrom the sheet: 24–27°C, humidity 80%

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.

Check your setup against this sheet I keep one 123 plants usable with this species
Back to the globe My keep

https://keepr.pet/husbandry/en/geograpsus-grayi

‹ All husbandry guides
Temperature24–27 °C
Humidity80 %
Enclosure20×25×18

The numbers

Temperature

152025303540 °C
24–27°Ambient

One ambient band, 24–27°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 states24-27 °C.

Humidity

80%Target RH

The sheet states~80%

Identity

Adult size

1.75 m4–5 cm
1520100400 cm
4–5 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 / Grapsidae
Origin
Adult size
Carapace ~4–5 cm
Activity
Nocturnal terrestrial
Temperament
Fast, defensive

Enclosure and conditions

Enclosure

80 % RH20 cm18 cm
50100150200 cm
20 × 25 × 18 cmWidth × depth × height
5dm² of floor
Substrate: not in our dataWater: not in our dataWarm side: not in our dataHides: not in our dataUVB: not in our data

Drawn from the stated numbers. Only what the sheet states is drawn inside.

Why

The rectangle carries the exact width-to-height ratio of the figures above it, and the ruler under it places that width on the 0–250 cm scale every sheet here shares, so two species still compare at a glance. Nothing is added that the sheet does not name: a lamp drawn on a sheet that never mentions one would be invented equipment. What the sheet leaves out is listed rather than left blank, because an empty tank reads as « none needed ».

The sheet states20 x 25 x 18 cm / 8 x 10 x 7 in for a single adult

Temperature
25–29 °C
Humidity
75–90% + shallow brackish water dish
Min. enclosure
Terrestrial paludarium, deep damp substrate to burrow

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

Staple food
Omnivore/scavenger — veg, fruit, protein, dried insects
Supplements
Cuttlebone

Behaviour and handling

HandlingMinimal: pinches
CommunalSolitary/aggressive: house singly
MoltingMolting: provide calcium + do not disturb

Reproduction

Reproduction
Marine larvae: not bred in captivity

Common health problems

Failed molt
Signslow humidity / calcium
Preventhumidity + cuttlebone

When to see a vet

Not veterinary advice.

Good to know

  • A powerful land crab that climbs and burrows: needs a secure, humid land setup.
  • A powerful land crab that climbs and burrows — needs a secure, humid land setup.

What it needs

Enclosure at least 20 × 25 × 18 cmbecause enclosure — 20 x 25 x 18 cm / 8 x 10 x 7 in for a single adult
A thermometerbecause temp — 24-27 °C.
A hygrometerbecause humidity — ~80%

Every line above is deduced from a value this sheet states, and names which one. Nothing here is a general recommendation.

Sources

General land-crab husbandry (paludarium)

Others in this group

Caribbean / Purple Pincher Hermit CrabCoenobita clypeatusGiant African Land SnailLissachatina fulicaRed Apple CrabMetasesarma aubryiIndonesian / Purple Land Hermit CrabCoenobita brevimanusRuggie Land Hermit CrabCoenobita rugosusVampire Crab (assorted Geosesarma)Geosesarma sp. (e.g. dennerle, 'red devil')Giant Pink-foot / Immaculate Land SnailAchatina immaculataGiant West African / Banana Rasp SnailArchachatina marginata

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.