Assertion: bluefin tuna's fin | /r/HasProperty | pectoral
Facets:
value: especially
type: OTHER
Source sentences:
text: Additionally, bluefin have the ability to retract their pectoral fins, and their relatively stiff body channels their muscular energy directly to a highly efficient, crescent-shaped tail.
text: Tunas also have relatively large median fins (especially the dorsal, or top fin), which is an adaptation to minimizing the drag associated with sideways slippage of the body during swimming.
text: By using their pectoral fins like the wings of a plane, they generate lift.