Fossarus bellus is a species of sea snail, a marine gastropod mollusc in the family Planaxidae.
Description The maximum recorded shell length is 3.5 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 18 m. Maximum recorded depth is 196 m.
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