Water parameters
Overview
The red devil crab is a small Geosesarma species scientifically described in 2015 together with the vampire crab (Geosesarma dennerle). Its shell is about 2 cm; its dark body, red-orange legs and claws and yellow eyes make it recognizable. It is semi-terrestrial: it spends most of its time on damp land and enters the water only to wet itself and feed. Because it breeds without a larval stage, producing fully formed tiny crabs, it can be bred at home.
Tank Setup
- A paludarium: most of the floor damp land (moss, roots, dried leaves), with a section of fresh water 3–5 cm deep; an exit ramp from the water is essential.
- 22–26°C and high humidity; mist regularly.
- A tight lid; it escapes by climbing glass and cables.
- A hiding place for each individual; do not disturb it while it is molting.
Diet
Omnivorous. It eats sinking tablets, shrimp food, frozen bloodworms, small insects, blanched vegetables and pieces of fruit. Remove leftover food the next day; it molds quickly in a humid environment.
Behavior and Compatibility
Nocturnal; males are territorial among themselves. Given the chance it catches small shrimp.
Good companions: It is best kept with its own species; snails in the water section usually have no problems.
Avoid: Fish, dwarf shrimp, other crab species (including the vampire crab).
A short profile for this species
The Red Devil Crab page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.
Tank mates
This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.
Usually compatible
Flame Tetra
Glass Tetra
Blackfin Corydoras
Polystictus Corydoras
Emerald Betta
Emerald Cory
Emerald Dwarf Rasbora
Porthole Catfish
Keyhole Cichlid
Firemouth Cichlid
Should not be kept together
Hobbyist notes
Things you won't find in books, learned by trial and error. The most helpful ones are on top.
Change history and contributors
- Page created · October 16, 2026







