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Project Noah Nature School
Atrina rigida
They are marine bivalve molluscs in the order Pterioida. The shells are fragile and have a long and triangular shape, and in life they are anchored in sediment using a byssus.
Taken from the salt waters of Tampa Bay by a fisherman and discarded on a fishing pier.
Spotted on Apr 14, 2013
Submitted on Apr 14, 2013
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