They are cool. I literally watch them move to several locations and it was amazing. They have grown in just the few weeks I have had them.
Swimming Scallops or Calico Scallops for sale.
Live scallops for saltwater aquariums are reef safe and love sand beds.
Calico or swimming scallops are a great animal to observe in the reef tank and they are great water filters.
Sometimes when startled or when they want to reposition themselves these swimming scallops will lift off and swim.
This is an active scallop. Great addition to tank, watch them swim around like a bunch of chattering teeth