Otter

Adult river otters weigh 10 to 33 pounds (4.5 to 15 kilograms) and are about 2.5 to 5 feet (76 to 152 centimeters) in length. Females are roughly one-third the size of males. Provided it survives its first year of life, a typical North American river otter will live to the age of 12, with some surviving longer. The oldest living river otter on record was 27 years old.