Common name: Blue-legged Hermit Crab

General information

The Blue-legged Hermit Crab, Clibanarius rutilus, is a small and colorful crustacean that is popular among reef aquarium hobbyists for its scavenging abilities. Its vibrant blue legs, which give it its common name, make it a visually appealing addition to the tank. This species is known for its active behavior and its role in controlling algae and detritus within the aquarium ecosystem.

Care

Clibanarius rutilus is relatively easy to care for, requiring a tank with plenty of live rock and substrate to scavenge on and hide in. They are omnivorous and will consume a variety of foods, including algae, leftover fish food, and detritus. It's important to ensure that there are enough empty shells in the aquarium for the hermit crabs to move into as they grow, preventing potential aggression towards snails for their shells.

Reproduction

In the wild, Blue-legged Hermit Crabs reproduce by releasing eggs and sperm into the water column, where fertilization occurs. The larvae go through several planktonic stages before settling to the bottom and metamorphosing into juvenile crabs. Reproduction in the home aquarium is rare, but providing a stable environment with good water quality can encourage breeding behavior.

Habitat

Clibanarius rutilus is found in the tropical Western Atlantic, from Florida and the Gulf of Mexico to northern South America. They inhabit shallow waters, often associating with coral reefs, seagrass beds, and rocky substrates where they can find food and shelter.