noun pl. yellowtails or yellowtail
- ☆ any of a genus (Seriola) of large, marine, food and game jack fishes; esp., a species (S. lalandei) of the Pacific
- ☆ any of various other fishes having a yellowish tail, as the (Ocyurus chrysurus), the (Limanda ferruginea) of the W Atlantic, the (Sebastes flavidus) of the E Pacific, and the silver perch (sense )