The polychaetes from the dorvilleid genus Ophryotrocha were previously considered to be shallow-water dwellers of organically enriched environments, but recent exploration of similar habitats in the deep sea have showed that the genus is not restricted to a certain depth. New species of Ophryotrocha have been found at whale-falls, cold seeps and hydrothermal vents as well as in sediments beneath fish farms, in the Atlantic, Pacific and Southern Ocean and at depth spans from 30 m to below...