- Species: Yeerk
- Home Planet: Unknown
- Skin Texture: Green (slimy, similar to a slug only larger)
- Eye Color: Yeerks are blind, because they have no eyes
- Height: 6 to 7 inchs
- Adaption: Crawls into hosts head and uses the brain to take other the body.
- Life Span: Unknown, or unless they breed and create a larva then die off
- Food: Kandrona Rays
- Predator: Andalites, and humans
- Click here for more info on the Yeerks
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