Symbites

Symbites are a sapient species in the Holly Grovian galaxy. They hail from the planet Simbiosis, and look identical to humans. A notable weapon they have is their sonic scream. However, other Symbites, and feline sapiens are immune to this. Symbites can have children with humans. Their children would only have a sonic scream if their father was a Symbite, and mother was a human, however they would be immune either way.