Hawaiian Whitefoot Hermit Crab

Calcinus hazletti

The Hawaiian Whitefoot Hermit Crab, Calcinus hazletti, is a small crustacean found exclusively in the waters of Hawaii. This species is part of the family Diogenidae and is known for its distinctive white-tipped legs, which help divers identify it among other hermit crabs. It inhabits the benthic zone, primarily residing on branching corals. The crab is typically found at depths ranging from 6 meters to deeper waters, though most observations occur shallower than 40 meters, with a significant number at less than 20 meters. In terms of behavior, the Hawaiian Whitefoot Hermit Crab is known for its precopulatory courtship rituals, which involve olfactory and tactile cues. This species is gonochoric, meaning individuals are distinctly male or female, and reproduction involves indirect sperm transfer. Divers encountering the Hawaiian Whitefoot Hermit Crab can observe its interactions with the coral habitat. Observing this crab in its natural environment offers a glimpse into the complex ecosystems of Hawaiian coral reefs.