close-up of an atlantic giant cockle shell found buried in sand

animal atlantic beach bivalve bivalves brown buried burrows close closeup cockle cockles covered creamy dinocardium dinocardiumdinocardium florida food found giant invertebrate large macro marine markings mollusk naples nature near ocean orange organism outdoors photography piece reddish robustum saltwater sand sea seashell seashore shell shellfish shore substrate summer tropical water white