They’re Fast Swimmers
If you thought you were a fast swimmer, you’re nothing compared to otters. These guys can “reach swim speeds of up to 7 miles per hour. This pace is three times faster than the average human swimmer.” And if you’ve been practicing holding your breath, otters also have you beat. They can “hold their breath for 3-4 minutes, closing their nostrils and ears to keep out water.” They have strong, powerful tails that propel them through the water, and webbing between their toes that make them swim fast and furiously (Northern Woodlands).