scallop seamless pattern. hand drawn seafood on chalk board. engraved style seashell. retro mollusk background

background beach bivalve board chalk chalkboard clam classic cockleshell design drawing drawn engraving food fresh graphic hand illustration marine menu mollusc mollusk mussel ocean oyster pattern pearl premium restaurant retro scallop sea seafood seamless seashell seashore shape shell shellfish sketch snail underwater vector vintage