Onoba grisea is a species of small sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.Rosenberg, G. (2012). Onoba grisea. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=197326 on 2012-06-23}
Description The maximum recorded shell length is 2.52 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. .
Habitat Minimum recorded depth is 0 m. Maximum recorded depth is 102 m.
References
Ponder, W. F. (1983) Rissoaform gastropods from the Antarctic and sub-Antarctic: the Eatoniellidae, Rissoidae, Barleeidae, Cingulopsidae, Orbitestellidae and Rissoellidae (Mollusca: Gastropoda) of Signy Island, South Orkney Islands, with a review of the Antarctic and sub-Antarctic (excluding southern South America and the New Zealand sub-Antarctic islands) species. British Antarctic Survey, Scientific Reports 108: 1-96