Dolphins, porpoises, beaked whales, and sperm whales are all odontocetes. The pectoral fins are highly modified arms. The part of the body of cetaceans posterior to the anus and to which the flukes attach. Pod Collective term for a group of whales. Many species of cetaceans have apparent long-term associations as a group.
Research is ongoing as to the extent of pod cohesion over time.
The newborn or infant offspring of pinnipeds. The structure formed by the forward-projecting parts of the jaws in some marine mammals.