This May 2016 video says about itself:
Divers made a rare discovery of extinct giant sloths in a Cuba cave. Geographer and National Geographic Grantee Matthew Peros and his team found fossils of three extinct sloth species in an underwater cave near Varadero. Underwater caves with extinct animal remains are extremely rare. Peros hopes to learn more about ancient climate and environment from studying the remains.
Another video used to say about itself:
Fossil of New Giant Sloth Species Found in Underwater Cave | National Geographic
31 August 2017
In an underwater cave in the Yucatán in Mexico lie the well-preserved remains of an ancient giant sloth.
Footprints prove humans hunted giant sloths during the Ice Age. Once-hidden prints, visible only in certain conditions, detail a dramatic chase. By Dan Garisto, 4:08pm, April 25, 2018.