Assertion: marlin's age | /r/HasProperty | derived with difficulty
Facets:
value: from annual rings on fin rays
type: LOCATION
Source sentences:
text: Swordfish ages are derived, with difficulty, from annual rings on fin rays rather than otoliths, since their otoliths are small in size.
text: Swordfish ages are derived, with difficulty, from annual rings on fin rays rather than otoliths, since their otoliths are small in size.