In a rock pool.
Green crab. 3 pairs of walking legs. Seen to filter feed. Collected for a class.
Hiding in sponges/tunicates on dock. AKA Charming Porcelin Crab. ID as per Humann and DeLoach, p. 147.
Here's another cute Pachycheles rudis (Thickclaw Porcelain Crab), the third I've found in two days.
Lately I've been finding several tiny Pachycheles rudis (Thickclaw Porcelain Crabs) and each one seems to have a feisty personality.
Another lively Petrolisthes eriomerus (Flattop Crab), a porcelain crab, identified with its blue marks between its pincers.
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.