As its name suggests, the giant otter is huge. Its body grows to a length of up to 1.7 metres, which is the longest of all the otters on Earth.
Giant otters are also known as river wolves. They live in freshwater rivers and streams which are usually affected by seasonal flooding. Fish makes up the majority of their diet. They hunt either alone or in groups. A giant otter eats two to four kilograms of food per day. Fish are supplemented by crustaceans, snakes, and other river creatures.
Giant otters are well adapted for the aquatic way of life. They have webbed feet, water-repellent fur to keep them dry and warm, and nostrils and ears that close in the water. They swim by propelling themselves with their powerful tails and flexing their long bodies.
Giant otters are active during the day. They also have the reputation of being the noisiest of all the otters; scientists have documented distinct vocalizations that indicate alarm, aggression, and reassurance.
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