Hippopus hippopus - The Hippopus Clam is an interesting clam that is also great for beginners. They have similar care, patterning, and coloration as Derasa clams, but the mantle does not extend past the shell like other giant clam species. These clams have the ability to quickly polish aquarium water. They are hardy and grow very quickly.
These are around 2" in size and feeding on Reef Nutrition Shellfish Diet 1800 (SD Aquarist Shellfish Diet)