Small giant clam

A survey covering 1,300 km of the Saudi Red Sea coast found Tridacna maxima throughout the study area, from the Gulf of Aqaba south to the Farasan Banks.

A 2020 study estimated the contribution of calcification by giant clams combined at about 0.7% on average, and possibly up to 9%, of the mean calcium carbonate budget of Red Sea coral reef communities. This is an estimate for giant clams as a group, not for Tridacna maxima alone.