There are several species of Porcelain Crab in several genera, all small, 10-legged crustaceans related to
true crabs but really types of squat lobster. They are mostly prettily-patterned and delicate (easily breaking off limbs - which eventually regrow),
hence the name "porcelain".
In anemone.
Spotted Porcelain Crab with Squat Shrimp.
The pincers.
The Spotted Porcelain Crab, also called Porcelain Anemone Crab, Neopetrolisthes maculatus,
also N. ohshimai, lives in protective sea anemones on tropical reefs of the Indo-Pacific. They can grow to 5cm wide and they eat plankton.
They have large claws for their size, used for protecting territory (their anemone) from crab intruders.