[s7e4] Alaska's Cold Water Killer May 2026

In "Alaska's Cold Water Killer," a River Monsters season 7 episode, Jeremy Wade investigates mysterious, fatal incidents in freezing Alaskan waters, suspecting a creature that can overpower humans. After investigating local lore and environmental challenges on the Kenai Peninsula, Wade identifies the Salmon Shark ( Lamna ditropis ) as the formidable predator, highlighting its ability to thrive in cold water via endothermy. The episode concludes that these, and similar, apex predators are perfectly adapted to their harsh, deep-water environment.