Cyrtopleura costata

Angelwing, a reference photo
Photo: MerlinCharon · CC0 (licence)

Cyrtopleura costata, or the angel wing clam, is a bivalve mollusc in the family Pholadidae. It is found in shallow parts of the northwest Atlantic Ocean and also in the North Sea coast of Scotland and the western coast of the Adriatic Sea in a remote area in the Marche region in central Italy. It lives on the seabed, where it digs its burrows through soft sand and mud using a very slow, revolving movement. These burrows can take years to form, and can reach a maximum depth of 8ft, but always below 3 feet (0.91 m) at the lowest tide.

From Wikipedia, under CC BY-SA 4.0.

Is it venomous or poisonous?

We have no record of Angelwing being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.

Easily confused with

Classification

Kingdom
Animalia
Phylum
Mollusca
Class
Bivalvia
Order
Myida
Family
Pholadidae
Species
Cyrtopleura costata

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