Shells blue or blackish and up to 8 cm long. White-shelled crustacean cemented to rocks and pilings, usually less than 1.5 cm. Grows in a columnar pencil-like form in crowded conditions. When covered by water, extends fan-like appendages to filter small food particles. Pagarus longicarpus Longwrist hermit crab Crab with a soft, shell-less abdomen living in a vacated snail shell .
Major claw is almost twice the length of the minor claw.
Green crab Dark green to almost black crab with 5 teeth along carapace to the side of each eye. Underside of shell is yellow-green in males and immature crabs, and orange in mature females. Shell width to 8 cm. A flattened crab with pointed, striped legs usually brown to greenish in color. Shell width to 5 cm.