| It is a marine gastropod that swims by rhythmically flapping its wing-like parapodia. |
| Both the foot and the parapodia are innervated by nerve trunks originating most often from the pedal ganglia. |
| Among the Anaspidea, numerous species of the genus Aplysia, such as A. brasiliana, are capable of swimming by undulating their parapodia. |
| The pteropod mollusk Clione limacina swims by flapping a pair of wing-like parapodia. |
| In the latter group, parapodia are highly modified into wings. |
| Swimming results from alternate dorsal and ventral flexions of two symmetrical wing-like parapodia. |
