threadfin
/ˈθrɛdˌfɪn/
noun
- A type of tropical fish with long, thread-like rays on its fins, often found in warm coastal waters.
- The threadfin is a popular catch for sport fishermen in the Gulf of Mexico.
- We saw a school of threadfin swimming near the coral reef.
- The threadfin's long fin rays help it sense movement in the water.