Did you know a river otter can stay underwater for as long as eight minutes? 🦦 River otters communicate with whistles, yelps, growls, and screams, as well as touch and body posture. They can grow three to four feet (0.9 to 1.2 meters) long including their tail and weigh between 11 and 30 pounds (5 to 14 kilograms). Their long, strong tail helps propel the otter through the water at quick speeds. On land a river otter can run at speeds of up to 15 miles (24 kilometers) an hour—they can slide eve