Assertion: marlin's fin | /r/HasProperty | pectoral
Facets:
Source sentences:
text: Its pectoral fins are rigid and do not fold into its body.
text: Most of the time, when a blue marlin jumps, and especially when grey hounding, they will fold their pectoral fins
text: Its first anal fin, along with its pectoral and caudal fins, can be folded into grooves.