Assertion: porpoise's fin | /r/HasProperty | triangular dorsal
Facets:
Source sentences:
text: The body of the Harbour Porpoise is robust and they have a triangular dorsal fin.
text: Also, porpoises have triangular dorsal fins, while dolphins have curved or hook-shaped fins.
text: Dolphins generally have a very curved or hooked dorsal fin, while porpoises have a triangular dorsal fin.
text: The porpoise has a blunt snout, many teeth and a triangular dorsal fin.
text: Porpoises also tend to have triangular dorsal fins, rather than the falcate dorsal fins of most dolphins.
text: Dolphins have hooked (wave-like) dorsal fin, while porpoises have triangular dorsal fin which resembles a dorsal fin of sharks.
text: Porpoises are smaller than dolphins and have a triangular dorsal fin, although some porpoises have no fin at all.