Searching for "pole and line caught tuna" will turn up a bunch. If you are in the US, Wild Planet probably has the best grocery store distribution. Raincoast seems bigger in Canada, but has some US distribution. American Tuna sells on Amazon and is great.

One of the other differences that most of the line caught tuna brands cook the raw tuna directly in the can, rather than cooking first and then canning. This results in much better texture. Other than price, it's a superior product in almost every way.

I believe Wild Planet is what I buy - it's printed on the can for sure

Can’t recall off the tip of my head but brands usually advertise on the packaging if the fish is line-and-pole caught.