GIANT CLAMS play various ecological roles in coral reef ecosystems by contributing to marine food chain. Their tissues, gametes, and excreta serve as food for predators, scavengers, and opportunistic feeders.
Their shells serve as substrate for other organisms like corals, sponges and algae, and help control eutrophication by filtering the sea water.
Healthy populations of giant clams contribute significant quantities of calcium carbonate material into the reef structure. The presence of giant clams in reefs also serve as outstanding indicators of fishing pressure and water quality.