Species group: Crabs and Lobsters
Other common names:
Scientific name: Perisesarma bidens
The Red Claw Crab is a species of crab found in the estuaries of Thailand, Japan, Hong Kong, South Korea and Singapore. Red-clawed crabs are semi-terrestrial, spending most of their time completely submerged in brackish water. They reach maturity in 8 months and their brief lifespan ranges from 2 to 4 years.
Red Claw Crabs range from dark red to reddish brown, except for the claws which are a consistent bright red, hence their popular name. Sexing is easily done by observing their symmetrical claws. The males have bigger claws as opposed to females which have smaller, overall slimmer claws.
A minimum of a 10 gallon tank is recommended for each individual, as nocturnal species they come out at night and explore their surroundings, thus the need for space. Red Claw Crabs need to be kept in brackish water that also has an area above the water, where they can occasionally dry off and breathe. Sand makes a good substrate and allows them to sift through it searching for food. Being kept in full freshwater with no land access is not good for their long-term survival.