When most people prep for their tuna trip, they think about power. They stock up on big reels and thick line because they figure it’s all about raw strength with these fish. But this misses the mark. It isn’t necessarily about how strong you are; rather, it’s about knowing what species of tuna you’re trying to catch, along with its habits and life cycles.
The graphic above shows physical traits of six main tuna species and what happens if you use tackle meant for a skipjack instead of bluefin. It typically result in either losing the fish or breaking your gear.
Why Knowing Tuna Species Matters
Unlike the yellowfin, which has explosive acceleration, this is no sprinter; the Atlantic Bluefin are made to last. It’s almost a ton of fish and more than ten feet long. But its main asset is durability. A bluefin holds heat, meaning it swims comfortabley in cold water when other predators slow down. If you catch a bluefin, it’s a marathon, and the one you’re fighting are in good cardiovascular shape. Big bluefin put out sustained pressure on your fishing gear, which explains the heavy monofilament leader advice and 130-pound rod specs for giants. You don’t want tackle that only protects against an instantaneous shock; you need drag capable of maintaining pressure during prolonged periods.
Smaller in average size than the bluefin (yellowfins weigh around 110 pounds), but they hits harder by the pound. You’ve got a fish designed to make an explosive run for cover with its golden fins. A yellowfin might not wear you down across three hours like a bluefin is known to do. However, it does pull some violent runs where it feels like your rod is going to break off. Weighing them on average as 110 pounds and measuring 55 inches doesn’t seem too bad until you realize they also swim around fifty miles per hour. That speed becomes a serious challenge to your reflexes when you’re using light tackle.
The depth is important when we fish tuna. The novice will run a trolling lure or cast a popper around and never consider there are also species down deep. Bigeye live in the mesopelagic zone, where they often dive hundreds of feet into darker, cooler water to find prey. If you don’t drift live bait out deep or jig up and down then you’re not fishing for bigeyes. This vertical distribution is spelled out in habitat section. Knowing different species live in different thermal zones makes all the difference in how you throw your bait. Rather than randomly throwing it everywhere, youll manage the depth of your offering.
Fish size relates to conservation and sustainability. For example, in the past, there was a lot of overfishing on bluefin due to there high market value for sashimi grade cuts. According to the infographic, both Southern and Atlantic bluefin is considered either a vulnerable or endangered species. Why? Because they’re regulated with tough fishing rules for a good reason: You need a special license to catch one, and if it doesn’t meet very strict criteria you’re forced to release it. If we honor those restrictions, we’ll continue to have giants to tangle with twenty years down the road.
If you want to start recreational tuna fishing with minimal hassle, get ready to catch skipjacks and albacore. They’ll teach you to manage a running fish. Because they’re little but feisty, and skipjack is everywhere. Albacore are bigger, stronger and generally available in temperate waters. Catching them gives you that muscle memory of how to do it right before going after some really big stuff. It’s a gradual approach, not simply catching the largest trophy first day out. You should of prepared for this.
The key to catching tuna is figuring out how to match the fish behavior. Knowing what depth each type of tuna likes to swim at, as well as their ideal water temperatures, put you at a great advantage. This information acts as a map, and it’s up to your intuition to fill in the blanks. Next time you get that solid run on a fish, you’ll know whether it’s a bigeye tuna trying to dive deep or a bonito hunting near the surface. It’s the difference between victory and frustration.