In 2014 , scientists reported that they had used satellite-linked tags to track Cuvier 's beaked whales off the coast of California and found the animals dove 2,992 meters ( nearly two miles ) below the ocean surface and spent two hours and 17 minutes underwater before resurfacing , which represent both the deepest and the longest dives ever documented for any marine mammal .
On March 27 2014 a Cuvier 's beaked whale tracked by a satellite-linked tag set a new deep diving record for a sea mammal , plunging nearly two miles below the ocean surface .