Bittiolum alternatum is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae.
Description The maximum recorded shell length is 8.3 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLOS One 5(1): e8776. .
Habitat The minimum recorded depth for this species is 0 m, maximum recorded depth is 37 m.
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