Soft-shell clam

Soft-shell clam or Sand Gaper; Temporal range:
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Myida
Superfamily:	Myoidea
Family:	Myidae
Genus:	Mya
Species:	M. arenaria
Binomial name
	Mya arenaria; Linnaeus, 1758

Soft-shell clams (American English) or Sand gaper (British English/Europe), scientific name Mya arenaria, popularly called "steamers", "softshells", "piss clams", "Ipswich clams", or "Essex clams", are a species of edible saltwater clam, a marine bivalve mollusk in the family Myidae.

Right and left valve of the same specimen:

Right valve
Left valve