Assertion: black marlin's fin | /r/HasProperty | concave
Facets:
value: sharply
type: DEGREE
value: in adolescents
type: OTHER
Source sentences:
text: The first dorsal fin is large and concave initially, but it becomes more proportional to the body size as the fish grows.
text: In adolescents, the first dorsal fin is large and concave, gradually reducing in proportion to body size with continued growth.
text: Their caudal fins and anal fins are sharply concave.