The ocean sunfish, aka mola mola, is the heaviest known bony fish in the world, with some adults tipping the scales at 2,200 pounds. While they're native to tropical and temperate waters, rising ocean temperatures have brought these big boys all the way up to the North Pacific and the Gulf of Alaska.
The same is true on the Atlantic coast in the Gulf of Maine. As the Portland Press Herald reports: "Before last year, lobster fisherman David Cousens of South Thomaston, Maine, had seen only one ocean sunfish in nearly 40 years of pulling traps. [Lately] he's seen a bunch of them, sometimes days in a row."