The minute marsh-loving beetles (Limnichidae) are small beetles of oval shape. The live an arenaceous or argillaceous edges of rivers or ponds, which are covered with algae. The beetles feed on the algae. Some species are known to live on coral reefs, coastal lagoons and mangrove swamps. Their centre of distribution is the tropical area. Worldwide 345 species in 35 genera have been described, thereof four from Germany.