It's A Flat Out Scallop Valve

Weathervane scallop • Patinopecten caurinus - Biodiversity of the Central Coast

What do sea scallops look like? - Quora

Normandy King Scallops Label Rouge

Applied Sciences, Free Full-Text

propatulus

San Diego Scallop Shell

Pecten maximus - Wikiwand

Using math and mechanics to explain how bivalve shells fit together so well

Pecten jacobaeus

Mediterranean scallop shell - Stock Image - C029/8394 - Science Photo Library

Calcareous valve hi-res stock photography and images - Alamy