Derasa Clam Shell (5”-6”) cauliflower The Rugosa are an extinct

The Rugosa are an extinct group of corals that were abundant in Middle Ordovician to Late Permian seas

There is a large foot with two curved flaps near the head and a single long siphon

You will receive a similar item to what you see here and it will be very carefully packed for safe shipping

but there are also cold water species

or Cypraecassis rufa

Derasa Clam Shell (5”-6”) cauliflower The Rugosa are an extinctThe Derasa Clam (Tridacna derasa) is the second largest clam of the Tridacna clams. It is also one of the easier clams to care for. This clam can grow to about 20 inches in captivity. They typically have a brown gold coloration with white stripes or spots. It may also have bright blue along the outline of the mantel.