Porcelain crabs are decapod crustaceans in the widespread family Porcellanidae, which superficially resemble true crabs. They have flattened bodies as an adaptation for living in rock crevices. They are delicate, readily losing limbs when attacked, and use their large claws for maintaining territories. These Lobsters actually live amongst Anemones and similar corals sometimes coexisting with clownfish.

They require an anemone or similar coral host to feel safe.