Tridacna derasa (Röding, 1798)
Smooth giant clam
Tridacna derasa
photo by FAO

Family:  Cardiidae (cockles)
Max. size:  60 cm SHL (male/unsexed)
Environment:  benthic; marine; depth range 0 - 20 m
Distribution:  Indo-West Pacific.
Diagnosis:  It is characterized by a low primary and radial sculpture, variable shape, massive umbonal area and smooth white shell.
Biology:  Locally exploited for meat and shell. This species was previously quite abundant, but has been over collected in many areas. Aquaculture attempts being made (Ref. 348).
IUCN Red List Status: Vulnerable (VU); Date assessed: 01 August 1996 (A2cd) Ref. 123251)
Threat to humans: 
Country info:  Known from Raja Ampat Islands (Ref. 83492). C: Refs. 348, 83492, 117184; O: Ref. 83492.

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