Hippopus clam?

[alf3482]

I seen a clam at the LFS yesterday. Quit diffrent than i have seen. They called it the hippopus Clam can any one tell me What the species of clam this is? And Does it like rock or sand placement? I may purchase it if i can find some info.
Thanks

[MiNdErAsR]

Could be Hippopus hippopus or Hippopus porcellanus. Max size for both is about 40 centimeters, and H. porcellanus has a smoother shell. They prefer sandy patches on the reef. Reference: Giant Clams, by Daniel Knop.