covered | Biological specimen | Small Heath | Birmingham Small Arms Company | Small Heath, Birmingham | Brendon Small | Small Business Administration | Small appliance | Small and medium enterprises | Royal Small Arms Factory | It's a Small World | Very Small Records | The God of Small Things | Small Wonder (TV series) | Small Wonder | Small Press Distribution | small business | Small Blue | Small Angle Shades | Notes from a Small Island | Lithothamnion | Games of the Small States of Europe | Chris Small | A male ''Labidura riparia'' specimen in Köpenick | World Covered Court Championships | The Innocent Man: Murder and Injustice in a Small Town | Surrounded by Silence | Small Skipper | Small's jointweed | Small Heath (butterfly) |
This species is usually covered with Polyzoa, Lithothamnion, and other adherent matter, which obscures its appearance, but the shell itself is so rude, spongy, and bleached in appearance that the actual surface is often discriminated only when examined with a lens.
It favours rock pools and smooth rock covered with encrusting red algae such as Lithothamnion on which it feeds.
It is usually found on stones and boulders, especially those encrusted with red crustose algae such as Lithothamnion.