It is characterized by having stiff hairs on its otherwise naked tail, which are believed to help the animal swim.
aquatic | Aquatic animal | The Life Aquatic with Steve Zissou | International Academy of Aquatic Art | Arboreal locomotion | Aquatic Species Program | Animal locomotion | The Life Aquatic with Steve Zissou (soundtrack) | Swiss Federal Institute of Aquatic Science and Technology | Outdated restoration of aquatic ''A. altus'', by Charles R. Knight | Aquatic locomotion | aquatic animal |