Blackfin tuna may be smaller than their  bluefin and yellowfin cousins, but these football-shaped fish can hit a bait as hard as a linebacker barreling into the backfield.  Found from Cape Cod to Brazil throughout the western Atlantic and in the Gulf of Mexico, blackfin tuna prefer water temperatures above 68 degrees.
These voracious feeders are often found around shrimp boats, especially in the morning as the shrimpers cull their catch, but this species will show up just about any time bait is in the water. …