Fin whale (Balaenoptera physalus) showing the chevron markings on its flanks. Bay of Biscay, SW Europe. (RR)

fin whale balaenoptera physalus showing chevron markings flanks bay of biscay sw europehorizontal landscape whale whales cetacean cetaceans mammal mammals marine surface surfacing rare endangered threatened ocean sea north atlantic ocean coastal waters dorsal fin horizontal diving skin individual scar scars marks