Tridacna maxima

Maxima clam-Óriáskagyló The maxima clam (Tridacna maxima), also known as the small giant clam, is a species of clam found throughout the Indo-Pacific. They are much sought after in the aquarium trade, as their often striking coloration mimics that of the true giant clam, however the maximas maintain a manageable size, with the shells of large specimen typically not exceeding 20 centimetres (7.9 in) in length.