Peanut Otter is the 8-year old brother of Jelly and Butter, and the oldest of the Otter kids. He is also one of the main protagonists of the show along with his siblings. Peanut is best friends with Munchy Beaver and Flick Duck, and he's also a fan of the Mallard Man comic books. Peаnut doesn't like to dance, especially the "Noodle Dance" but he does it anyway. He is voiced by Adam Rose.
Peanut is a red otter who wears white socks and brown loafers. Like Butter, his belly button shows up on his body throughout the show.