Enchytraeidae is a family of microdrile oligochaetes. They resemble small earthworms and include both terrestrial species known as potworms that live in highly organic terrestrial environments, as well as some that are marine. The peculiar genus Mesenchytraeus is known as "ice worms", as they live in glaciers and will die if exposed to temperatures a few degrees above freezing. Apart from these, the best-known species is probably the Grindal Worm (Enchytraeus buchholzi), which is commercially bred as aquarium fish food. Selected genera Enchytraeidae genera include: Achaeta Vejdovský, 1878 Archienchytraeus Eisen, 1878 (nomen dubium) Cernosvitoviella Nielsen & Christensen, 1959 Christensenidrilus Dózsa-Farkas & Convey, 1998 (= Christensenia Dózsa-Farkas & Convey, 1997 (non Brinck 1945: preoccupied)) Cognettia Nielsen & Christensen, 1959 Enchytraeina Bülow, 1957 Enchytraeus Epitelphusa Drago, 1887 Fridericia Michaelsen, 1889 Globulidrilus Christensen & Dózsa-Farkas, 2012 Grania Hemifridericia Nielsen & Christensen, 1949 Henlea Michaelsen, 1889 (= Henleanella) Lumbricillus Ørsted, 1844 (= Enchytraeoides, Pachydrilus) Marionina Michaelsen in Pfeffer, 1890 (= Marionia Michaelsen, 1889 (non Vayssière, 1877: preoccupied), Michaelsena, Parenchytraeus) Mesenchytraeus – ice worms Neoenchytraeus Eisen, 1878 Randidrilus Coates & Erséus, 1985 Stephensoniella Cernosvitov, 1934 Footnotes References (2008): Enchytraeidae. Version of 2010-MAY-11. Retrieved 2011-FEB-06. Tubificina