Assertion: shark's fin | /r/HasProperty | fin
Facets:
Source sentences:
text: It has two dorsal fins (fins on its back), and a pointed tail fin which is longer on the top than the bottom.
text: (A fish’s pectoral fins are the fins on either side of its body just behind the head.)
text: If threatened, the great hammerhead shark may begin an aggressive display, swimming jerkily with the pectoral fins (the fins on either side of the body) side lowered.