Assertion: dolphin | /r/HasAspect | pectoral flippers
Facets:
Source sentences:
text: Perhaps one of its most distinctive features, the dolphin has pectoral flippers that have all of the major skeletal elements of the forelimbs on land mammals in a modified version.
text: Dolphins have two pectoral flippers, containing four digits, a boneless dorsal fin for stability, and a tail fin for propulsion.