They are often mistaken for sea otters, but they primarily inhabit freshwater areas while occasionally venturing into seawater for hunting.
Sea otters, especially mothers and pups, sometimes hold hands while floating on their backs.
Baby otters are commonly referred to as pups, but they can also be called kits or kittens. Female otters are known as sows, while males are called boars.
Three otter species have blunt claws or lack claws altogether.
Sea otters possess the densest fur of any animal species.
All otters, including giant otters, consume 20-33% of their body weight daily.
Otters can swim at speeds of up to 7 miles per hour, which is three times faster than the average human swimmer.