''Potamon rhodium'', commonly known as the Rhodes freshwater crab and locally known as the Valley crab, is a semi-

terrestrial Terrestrial refers to things related to land or the planet Earth, as opposed to extraterrestrial. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on o ...

crab Crabs are decapod crustaceans of the infraorder Brachyura (meaning "short tailed" in Greek language, Greek), which typically have a very short projecting tail-like abdomen#Arthropoda, abdomen, usually hidden entirely under the Thorax (arthropo ...

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to the island of

Rhodes, Greece Rhodes (, ''Ródos'' ) is the principal city and a former municipality on the island of Rhodes in the Dodecanese, Greece. Since the 2011 local government reform, it is part of the municipality Rhodes, of which it is the seat and a municipal unit. ...

. The unique pattern on the carapace seems to

mimic In evolutionary biology, mimicry is an evolved resemblance between an organism and another object, often an organism of another species. Mimicry may evolve between different species, or between individuals of the same species. In the simples ...

a moth. Like other crabs in the family Potamidae, it is an

omnivorous An omnivore () is an animal that regularly consumes significant quantities of both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize ...

species, and males are larger than females.

References

Potamoidea Crustaceans described in 1913 {{Eubrachyura-stub