Another title in the popular 'Did You Know?' series looking and Otters. This book is full of fun facts and insights into the world of Otters. As super-quick underwater fishers, Otters are a favourite animal of many people around the world. Did you know? Otters have webbed feet – just like a duck! – to help them swim more quickly through the water. The largest species is the Giant Otter of South America, which can grow to two metres in length. Most Otters prefer wild places away from humans, although some have taken up residence in big cities.