Red Claw Crab Care Guide

Perisesarma bidens

AggressiveModerate
Max Size
5.0 cm / 2.0"
Temperature
24–27°C (75–80°F)
pH Range
7.5 – 8.5
Min Tank Size
76L (20 gal)
Min Group Size
Can be kept alone
Tank Level
Bottom
Origin
Southeast Asia
Temperament
Aggressive
Difficulty
Moderate
Breeding Difficulty
Moderate

Diet

Omnivorous. A varied diet with a mix of dry and live/frozen foods is recommended.

Community Compatibility

Can be kept with non-substrate level fish, as these are prone to being attacked by the crab.

Good to Know

Keep only 1 male Red Claw Crab, as males are highly territorial.

Gender Differences

Males have larger, brighter claws.

About the Red Claw Crab

Red Claw Crabs, also known as Rainbow Crabs, bring a splash of color and intrigue to aquariums. Originating from Southeast Asia, these freshwater crustaceans boast vibrant red claws, distinguishing them as unique inhabitants in the world of aquarium keeping. Despite their name, Red Claw Crabs are not fully aquatic, showcasing an interesting combination of terrestrial and aquatic behaviors.

The Red Claw Crab's appearance is marked by its robust carapace, showcasing a blend of red, brown, and blue hues. Climbing enthusiasts, these crabs utilize aquarium decorations to ascend and explore. While their primary habitat involves brackish waters, they adapt well to freshwater conditions when provided with appropriate care.

In terms of behavior, Red Claw Crabs display territorial tendencies. It's advisable to create a well-structured aquarium with hiding spots and structures to establish territories within the tank. Omnivores by nature, they enjoy a diverse diet, including algae, small invertebrates, and commercial crab pellets. Observation reveals their active and inquisitive nature, making them an engaging addition to aquariums.

Providing an environment that mimics their natural habitat is crucial. This involves a balance of aquatic and land areas within the aquarium, ensuring that the crabs have access to both water and dry land. Though they are not fully aquatic, these crabs require a water source deep enough to submerge and molt properly.

Red Claw Crabs present a unique and visually appealing option for aquarium enthusiasts. Whether climbing decorations, establishing territories, or molting in water, these crabs add an element of diversity to the aquarium landscape. Understanding their semi-aquatic nature and providing a habitat that caters to both their terrestrial and aquatic needs contributes to the success of keeping Red Claw Crabs in captivity.

Stock Red Claw Crab in Your Tank

Use our free stocking calculator to see if Red Claw Crab fits your aquarium