Abundant. Many under close to every rock in the mid and low tide zones.
One of the many thousands of half crabs under the rocks in the rocky intertidal zone of Corsair Bay. This was the only crab species we found and it was extraordinarily abundant.
ECOL306 field trip
half crab on the beach amongst rocks
Porcelain crabs are decapod crustaceans in the widespread family Porcellanidae, which superficially resemble true crabs. They are typically less than 15 mm (0.6 in) wide, and 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.