Otomesostoma auditivum is mainly known from marine and brackish water habitats, but it is also found in freshwater locations. It is a holarctic species and has been recorded from the North Atlantic Ocean and the Baltic Sea, including United States, Greenland, Iceland, Finland, Sweden, Germany, Ireland, United Kingdom, Italy, Switzerland, the Ural Mountains and Lake Baikal. It is a benthic species and its depth range in marine habitats is between . In Echo Lake in the Sierra Nevada, California, it is found at between whereas in some Alpine lakes in Europe it occurs at depths of .