Thumb is a baby Emperor Tamarin. She has a sister named Pointer. She made her only appearance in the season 6 episode "Mystery of the Mini Monkey Models." She gets her name from her size to human thumbs.
Physical Appearance[]
Thumb is a baby emperor tamarin with black fur around her head and legs, maroon fur around her body, and a long reddish-orange tail. Her lower back is lined with two dark stripes. Her eyes are yellow with brown pupils.