Florent's Guide To The

Tropical Reefs

Smooth Giant Clam
Tridacna derasa
Smooth Giant Clam
Also known as: Derasa Clam, Southern Giant Clam
Category: Giant Clams
Scientific Name: Tridacna derasa
Size: Up to 20 in. (up to 50 cm)  
Depth: 3-30 ft. (1-10 m)
Distribution: Indo-West Pacific, Australia
Mollusca (Phylum) Mollusks
└Bivalvia (Class) Bivalves
 └Cardiida (Order)
  └Cardiidae (Family) Cockles
   └Tridacninae (Subfamily) Giant Clams
    └Tridacna (Genus)
     └T. derasa (Species)
WoRMS ID: 382205🔗
iNaturalist ID: 50593🔗

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© 2026 Florent Charpin