Tellinidae

Tellinidae
A shell of Tellina fabula
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Subclass:	Heterodonta
Order:	Veneroida
Suborder:	Sphaeriacea
Superfamily:	Tellinoidea
Family:	Tellinidae Blainville, 1814
Genera
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The Tellinidae are a family of marine bivalve molluscs of the order Veneroida. commonly known as tellins or tellens. They live fairly deep in soft sediments in shallow seas and respire using long siphons that reach up to the surface of the sediment.

Tellinids have rounded or oval, elongated shells, much flattened. The two valves are connected by a large external ligament. The two separate siphons are exceptionally long, sometimes several times the length of the shell. These siphons have a characteristic cruciform muscle at their base.

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Wikipedia