Blue Leg Hermit


The Blue leg reef hermit crab (Clibanarius tricolor) is a medium-sized species native to the Caribbean’s reefs and lagoons, as well as the Gulf of Mexico. Recognizable by their distinctive blue legs, these crabs are popular in marine aquariums due to their hardiness and their role in maintaining the health of reef environments. As opportunistic feeders, they help control algae by consuming a mix of algae, detritus, and uneaten fish food. Typically small, they reach about 1 inch in size. Blue leg reef hermit crabs are known for their peaceful demeanor and can coexist harmoniously with other non-aggressive invertebrates and fish.


Scientific Name

Clibnarius tricolor

Origin Caribbean
Max Size 1″
Family Diogenidae
Provider Keys Marine Life Direct

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Reef Questions

Are blue leg hermits reef safe?

The Blue Leg Hermit Crab can grow large enough to inhabit a one-and-a-half-inch shell and does well in groups. While they are considered reef safe, they may attack snails for their shells, and having extra empty hermit shells available for them can reduce this behavior.

How big do blue-leg hermit crabs get?

It is one of the smaller hermit crabs, with a maximum size of roughly one inch for a particularly large specimen.

How long do blue-legged hermit crabs live?

Hermit crabs climb over anything in the aquarium but are considered reef safe and do not disturb the corals; it may cause them to temporally close. Blue-legged hermit crabs can live up to 30 years in the wild. However, they only last for about 1-2 years on average when inside an aquarium.

Do Caribbean hermit crabs need saltwater?

Hermit crabs require both freshwater and saltwater water sources to survive. Saltwater should be made using sea salt sold for marine fish and crustaceans.

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