Collection data indicate that Ostrea permollis Sowerby is essentially restricted to one species of sponge, Stelletta grubii Schmidt. The oyster-sponge association is common on rocky, sand, and sea grass bottom in the northeastern Gulf of Mexico. O. permollis has
also been reported from North Carolina, where a population is thought to be disjunct. Factors that may limit distribution of the oyster-sponge association are mentioned.
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