You can catch tuna in a lot of different variables, so the main consideration when trying to find tuna is food. Tuna like to eat, so if you find the bait, you’ll find the tuna. You can use services like Hilton’s Offshore that will tell you altimetry, which is where your bait is going to be. If you find the bait and structure that will hold the fish, you’ll have a good day of tuna fishing on the Gulf of Mexico.