Atlantic Oyster Drill (Urosalpinx cinerea) and Channeled Welk (Busycotypus Canaliculatus) | Billion Oyster Project Species Identification Guide Atlantic Oyster DrillBillion Oyster ProjectBillion Oyster Project Species Identification GuideBluBlaze CreativeBusycotypus canaliculatusChanneled WelkmolluskNew York harborShiere MelinUrosalpinx cinereawatercolor