Definitions

1. noun

A species of tuna (Maguro arius) found in tropical waters, characterized by a black stripe running along its sides.

“The chef chose blackfin tuna for the sushi dish because of its rich flavor and firm texture.”

2. noun

A type of sailfish (Istiophoridae) with a distinctive black stripe on its fin.

“The angler was thrilled to catch a blackfin sailfish on his deep-sea fishing trip.”