Wild America — S3E6: Fascinating Fishes

A "Fish" is such a standard shape that we seldom think how ancient, yet how perfectly modern, is this superbly successful design. Here we see its most incredible variations, from the largest "living fossils" -- huge, prehistoric Alligator Gar -- to the smallest -- the dazzlingly colorful Darters. This underwater exploration leaves us marvelling at their adaptations.