Rhithropanopeus harrisii (common names include the Zuiderzee crab dwarf crab estuarine mud crab Harris mud crab and white-tipped mud crab) is a small omnivorous crab native to Atlantic coasts of the Americas from New Brunswick to northern Brazil.R. harrisii is usually found in brackish water but can also be found in freshwater. It likes to live on stones and in oyster beds. The crab can reach a maximum size of 20 millimetres (0.8 in). Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Animal