Assertion: puffer's fin | /r/HasProperty | pelvic
Facets:
Source sentences:
text: The Arothron is very maneuverable, even though it has no pelvic fins it moves about with the pectoral, dorsal and anal fins.
text: Totally lacking pelvic fins, the Spotted Puffer is able to use its pectoral fins to move about the aquarium with ease.