Streptopinna is an Indo-Pacific genus of bivalve molluscs characterized by a roughly triangular outline. There is only one species Streptopinna saccata.

Streptopinna
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Pteriida
Family: Pinnidae
Genus: Streptopinna
von Martens, 1850
Species:
S. saccata
Binomial name
Streptopinna saccata

Description

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No two 'Baggy Pen Shells' are alike: they grow into unexpected shapes, conforming to the shape and position of other hard structures (rocks,
coral skeletons, empty shells) in their immediate environment.

Distribution

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Warm waters of the tropical Indian and western Pacific oceans.

Habitat

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Buried in sandy bottoms.