Inbyo

Inbyos (インビョウ), or Inbyous, are gibbon-like primates inhabiting the Inverted Forest.

Description
Inbyos have very long arms and fingers that let them swing through the trees with ease. Dark fur covers their whole bodies, save for their hands, feet, and noses. Their eyes glow red.

They live in groups and are very territorial. If something trespasses into their territory, they will throw things at it and eventually give chase until the invader leaves.

Trivia

 * In the manga, they are referred to as "Inbyou", contrasting with the game and anime series, which refer to them as "Inbyo".