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Biology/Natural History: This is the most commonly found member of this family in this area and the largest Bittium species. They feed on algae and detritus. The empty shell is often occupied by small hermit crabs. Predators include white-winged scoters.

Lays eggs from February to May. There is no pelagic stage--juveniles emerge directly from the egg mass.


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© Rosario Beach Marine Laboratory

Source: Invertebrates of the Salish Sea

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