Giant bluefin crash the 100-fathom line as Gulf Stream sets up perfect canyon bite
Mid-60s water along the shelf edge stacking yellowfin, bigeye, and 96-inch giants from the Claw to Texas Tower.
The Gulf Stream finally made its move this week, pushing tight against the 100-fathom line and creating the temperature gradient we've been waiting for all season. That mid-60s water along the shelf edge has turned into a tuna highway, with yellowfin, bigeye, and giant bluefin stacked from the Claw all the way down to the Dip.
The bite exploded after Tuesday's northeast blow cleaned up the slope water and sharpened those thermal boundaries. What had been murky, blended water for weeks suddenly turned into crisp temperature breaks with clean chlorophyll edges — exactly what these fish need to feed aggressively. The Endorphin crew proved it Wednesday, boxing seven bigeye and thirty yellowfin in a single trip, working the 100-fathom contour where 66-degree Gulf Stream water meets the cooler shelf.
The giant bluefin are the real story here. We're seeing fish to 96 inches — legitimate giants that haven't shown up in these numbers since 2019. They're feeding hard on sand eels that got pushed up against the thermocline during the blow. The key has been finding those temperature breaks in 200 to 300 feet of water, where the warm edge creates an upwelling that concentrates bait.
For tactics, it's been a topwater game early and late. UV poppers and stick baits at first light are producing explosive strikes, especially when you can find birds working over the breaks. The fish are coming up high in the water column — I'm marking them 20 to 40 feet down on the sounder before they surface. Once the sun gets up, switch to trolling the edges with cedar plugs and small feathers. The yellowfin want speed — 8 to 9 knots through the clean water.
The approaching full moon is only going to make this better. Those fast-moving spring tides will push more bait against the canyon walls and keep the fish feeding aggressively through the lunar phase. The northeast wind that hurt fishing effort earlier this week actually set us up perfectly — it stacked the water column and created the sharp gradients that concentrate pelagics.
Chunk fishing has been solid too, especially for the bigeye that are holding deeper during the day. Fresh butterfish and squid on circle hooks, fished on the drift in 300 to 500 feet. The key is finding where that 64-degree water meets the 68-degree Gulf Stream flow — that's where the bigeye are staging.
Looking ahead, this full moon Friday should trigger even more aggressive feeding. The fast-moving tides will flush more bait out of the canyons and stack it against the temperature breaks. With the Gulf Stream locked in position along the 100-fathom line and clean chlorophyll showing on the satellite shots, we're looking at prime conditions through the weekend and into next week. This is shaping up to be the summer bite we've been waiting for — the kind of fishing that makes the Hudson Canyon legendary.