I was just watching the freshwater episode of Planet Earth which had a great sequence of crab-eating macaques foraging underwater in the Sundarbans, and I thought it would be interesting to see what underwater viewing options there are in zoos for anything other than the traditional aquatic mammals. There are loads of exhibits with underwater viewing for pinnipeds, manatees, polar bears, otters, etc, but what about crab-eating macaques, Allen's swamp monkeys, grizzly bears, bush dogs, capybaras....
Links to photos would be good too.
Links to photos would be good too.