Offshore fishing from Green Turtle can be rewarding when the major pelagics are migrating over the high-profile bottom structure along temperature breaks. The migratory dolphin, tuna, and white and blue marlin sweep past the Abacos chain, as is evident by the catches chalked up out of Boat Harbour, Treasure Cay, Green Turtle Cay and Walkers Cay, when it was operational. Granted, the more-popular bottom structures might be farther east, like the Mushroom, Jurassic Park and the Bridge, but Green Turtle has the Great Abaco Canyon, a nearly vertical formation of rocky cliffs and sediment-covered slopes. Depths range from roughly 5,000 to 11,000 feet. Forage species abound along these slopes and steep walls, attracting dolphin, tuna, and marlin.