Blue-Eyed Spotted Hermit Crab

Clibanarius digueti

The Blue-eyed Spotted Hermit Crab is a small crustacean found off the western coast of Mexico, particularly abundant in the Gulf of California. Both males and females of this species grow to about 2 centimeters in length. Its name comes from its distinctive blue eyes and the spotted pattern on its body, which can help divers identify it among other hermit crabs. This species is known for its behavior of forming large clusters, sometimes up to 700 individuals, during low tide. This hermit crab inhabits tropical benthic environments, where it plays a role in the ecosystem by feeding on detritus, green algae, and dead organic matter. It also consumes shed exoskeletons and has been observed attacking snails or other hermit crabs to acquire new shells. The Blue-eyed Spotted Hermit Crab exhibits a precopulatory courtship ritual, using olfactory and tactile cues, and typically engages in indirect sperm transfer during mating. Divers encountering this species may find it in clusters on the ocean floor, actively scavenging for food. While it is not evaluated for conservation status by the IUCN, it is harmless to humans and poses no threat during a dive.