Anadara floridana
The Cut-Ribbed Ark, as with some other arks, has a conspicuous long straight hinge-line. It is distinguished from other similar shells by a deep narrow cut in the center of each radiating rib. This bivalve can grow to 4”.
Embryos develop into free-swimming larvae before maturing into a bivalve. Their habitat is in soft bottoms of mud and sand. They can be found from shallow water to a depth of 300 feet.
Live shells should never be taken from any Florida State Park.