"Porcelain crabs" refers to a type of small crustacean that resembles a crab and has a delicate, delicate shell, similar in appearance to porcelain. Full definition
Many of the anemones are home to delicate porcelain crabs, gorgeous anemone shrimp, and one of four different species of clown fish. (DiveAdventuresAsia.com)
Look closely for porcelain crabs on the anemones and you'll likely find a few nudibranchs as well. (diveplanit.com)
Clownfish in their hundreds hide in multi coloured anemones while porcelain crabs filter food in the current. (scubatravel.com)