Playful, strong swimmers, and expert hunters—meet the otters. These creatures are found on every continent except Antarctica and Australia. Their 13 species come in various shapes and sizes, from the sea otters found in coastal waters to the river otters frolicking in freshwater habitats. Seen in today"s image is the Eurasian otter on the beautiful Isle of Mull off the west coast of Scotland. With webbed feet, streamlined shapes and dense fur coats, otters are built for speed and agility underwater. They can dive deep and hold their breath for several minutes.