Assertion: porpoise | /r/HasAspect | no fin
Facets:
value: obviously
type: DEGREE
Source sentences:
text: Porpoises are smaller than dolphins and have a triangular dorsal fin, although some porpoises have no fin at all.
text: Dolphins also tend to be more slender, have a bigger head, and a larger beak (some porpoises have no beak or fin).
text: They, obviously, have no fin, but instead have a ridge from their blowhole to their tail fluke.