Assertion: whale | /r/HasAspect | dorsal fin
Facets:
value: on their back
type: LOCATION
value: as in other cetaceans
type: OTHER
Source sentences:
text: Why do some whales and dolphins have a dorsal fin?
text: Other whales have dorsal fins on their back; the triangular protrusion that often pops out over the sea surface.
text: Most whales and dolphins have a dorsal fin, but in some it has been reduced to just a series of bumps, such as in the sperm whale.
text: Most whales have a dorsal fin (in the middle of the back) which helps them maintain a steady line when swimming, belugas don't have this fin, but instead have a hardened long dorsal ridge.
text: As in other cetaceans, the whale has a flipper or pectoral fin on each side of its body, a dorsal fin, and two horizontal flukes forming the tail.
text: Right whales have large wide bodies, broad flippers and no dorsal fin on their back.