At just over an hour, THE SEA AROUND US moves much more enjoyably than THE ANIMAL WORLD. (And, unlike THE ANIMAL WORLD if I recall, wasn't completely cobbled together from bits & pieces of pre-existing footage.) A buddy of mine said he saw this on TCM, some time back, and that it still looked pretty good. (However, keep in mind we were both nuts about snorkeling back in our twenties, so are suckers for underwater stuff. But hey, it did land our man Irwin an Oscar.)