1. a tropical marine fish with long, thread-like rays extending from its fins

Examples

• The threadfin swam gracefully through the coral reef.
• Commercial fishermen often catch threadfin in coastal waters.
• The threadfin’s distinctive elongated fin rays help identify the species.
• Several species of threadfin are found in the Indo-Pacific region.
• The threadfin uses its sensitive fin rays to detect food in murky water.
• Local markets sell fresh threadfin caught by small fishing boats.