Assertion: bluefin tuna's body | /r/HasProperty | stiff
Facets:
value: relatively
type: DEGREE
Source sentences:
text: Bluefin have stiff bodies and do not bend when they swim like most fish.
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.