Size: River otters are relatively small, with adults typically measuring between 23 to 36 inches in length, excluding their tail. Their weight ranges from 10 to 33 pounds.
Body Shape: Otters have streamlined, elongated bodies that allow them to navigate water efficiently. They have a long, cylindrical body with short legs, webbed feet, and a flattened head.
Fur: Otters possess dense, water-repellent fur that helps them stay warm and dry in aquatic environments. Their fur is typically dark brown, but it can vary from reddish brown to black or even gray.
Head: Otters' heads are rounded, with small, rounded ears that can close when they dive underwater. Their eyes are dark and situated high on their heads for better visibility while swimming.
Tail: The river otter's tail is thick, muscular, and slightly flattened, providing excellent balance, agility, and propulsion while swimming.
Legs and Feet: Their short legs have webbed toes, enhancing their swimming abilities. Otters are expert swimmers and can maneuver effortlessly through water.
Claws: Otters have non-retractable claws on their toes, helping them grip slippery surfaces and catch their prey.
Ears and Eyes: Their ears are adapted to close when they enter the water, preventing water from entering their ear canal. Their eyes are small but provide good vision both in water and on land.
Whiskers: Otters have long, tactile whiskers that help them sense their surroundings and locate prey in murky waters.
River otters are well-adapted to their semi-aquatic lifestyle, exhibiting excellent swimming, diving, and foraging skills in freshwater habitats such as rivers, lakes, and streams.