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Isognomon perna
Isognomon perna (Linnaeus, 1767)
Rayed tree oyster
photo by FAO

Family:  Isognomonidae (tree oysters)
Max. size:  7.5 cm ShL (male/unsexed)
Environment:  benthic; marine; depth range 0 - 20 m
Distribution:  Indo-West Pacific: from eastern and southern Africa, to western Polynesia; north to Japan and Hawaii, and south to New Caledonia; Society Islands, eastern Polynesia.
Diagnosis:   
Biology:  Byssally attached to rocks, on reef flats or to the underside of boulders, on sand and gravel bottoms. May also occur at sub-littoral (Ref. 348) and intertidal depths on soft sediments (Ref. 87907).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans:  harmless
Country info:   
 

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