Fore-limb of a cetacean, also called the "pectoral fin"
the "arm" of the whale, the pectoral fin
a shoe for swimming; the paddle-like front is an aid in swimming (especially underwater)
the flat broad limb of aquatic animals specialized for swimming
Flattened fore- or hind limb of a marine mammal supported by bone.
Paddle-shaped front limb of a cetacean (sometimes known as "pectoral fin").
Flippers are wide, flat forelimbs that many marine animals use for swimming. Whales and other cetaceans have flippers.
A flipper is a digitless, typically flat limb evolved for movement through water. Various creatures have evolved flippers, for example most fish (although for fish the usual term is fin), as well as certain mammals (whales, pinnipeds) and reptiles (turtles).