Several large fossil fish teeth have been discovered team of researchers exploring the southwestern part of the Cook Islands, and it's believed that they belonged to megalodon sharks. This shark tooth was seen resting on the seafloor during Dive 09 of the 2026 Cook Islands ROV Exploration. At the time, the mission team was interacting live with Cook Islands Prime Minister Mark Brown, who guided remotely operated vehicles in the collection of the tooth, as per NOAA Image courtesy of NOAA Ocean Exploration, 2026 Cook Islands ROV Exploration. Seven shark teeth were collected on several dives during the 2026 Cook Islands ROV Exploration cruise. Image courtesy of NOAA Ocean Exploration, 2026 Cook Islands ROV Exploration.