Giant clam
The giant clams are the largest bivalve mollusks currently alive. These mollusks can weigh over 200 kilograms and can get to 120 centimeters in length.
The giant clams live in the Indo-Pacific region, in either broken corals or sand with flat coral. It can be easily spotted by divers, as it lives at depths of maximum 20 meters.
They open their shells during the day so that the algae living on its mantle tissue is able to photosynthesize,