Adult Dall's Porpoise (Phocoenoides dalli) bow riding in Southeast Alaska, USA. Note: Dall's porpoise is one of the fastest cetaceans in the world!

dalls porpoise phocoenoides dalli southeast alaska cetacean mammal odontocete phocoenidae cetacea cetaceans odontoceti toothed animal water sea ocean oceanic marine underwater swimming america north america us usa united states northern hemisphere action active motion movement bowriding riding waves alaskan boat ship vessel sealife wildlife marinelife behaviour behavior