Slider is a baby otter that was Martin and Chris found in the cypress swamp and tried to find his home but learns that he was from the northern woodlands as he did not know that alligators and alligator gars were dangerous. He was later reunited with his family. Like most otters, Slider loves to slide, swim, and eat fish. Like other otters, he is a cute and playful creature. He makes his first appearance in "Slider: The Otter" and then "Under Frozen Pond" where he helps the Kratts and there friends get around.
Slider is a small North American River otter with a swirl mark on his forehead.