cross-posted from: https://lemmy.ml/post/3040754

I don't know who the photographer is, but it's originally from reef2reef.com

From Wikipedia:

The maxima clam (Tridacna maxima), also known as the small giant clam, is a species of bivalve mollusc found throughout the Indo-Pacific region.[3]

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 specimens typically not exceeding 20 centimetres (7.9 in) in length.