Tridacna derasa -Southern giant clam or smooth giant clam
This one was observed in South Rock, Lankayan Island, Borneo.
Is hard to tell the species because I cannot see the clam's shell. But when I look at mantles it is most likely to be T. derasa, even though people was also suggesting me T. squamosa...difficult clams!
The southern giant clam, "Tridacna derasa", is a species of extremely large marine clam in the cockle family, Cardiidae.
Similar species: Cardiida
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