Hermit Crab - Petrochirus diagenes

The Giant Hermit Crab (Petrochirus diogenes) is a very large and aggressive crab for large aquariums. This type of crab can even catch small fish and is an aquarium centerpiece in itself.Most hermit crabs are scavengers. Some smaller hermit crabs will feed on algae like nuisance hair algae while larger hermit crabs are scavengers and carnivores. Most hermit crabs are opportunistic - they will not actively hunt for a fish or active invertebrates but will prey on sick, dead, or dying individuals. Only the larger hermits like those from the genuses Aniculus, Dardanus, Peguristes, and Petrochirus are a real threat to healthy, larger tankmates or to corals. Calcinus, Clibanarius, and Paguristes are some of the most common "clean-up crew" hermit crabs for algae control and to eat leftover foods and detritus. Hermit crabs that are underfed are also a greater threat to tankmates like snails and other invertebrates. Hermit Crabs have soft abdomens and use empty snail shells to protect their bo