Centaurians

The Centaurians are an underdeveloped race of primitives from the planet Centauri IV.

History
Centaurians are a primitive humanoid race who follow a tribe-like culture.

Centaurians are also one of the many races encountered by the Asgardians in the Nine Realms and the worlds beyond Yggdrasil.

After encountering the corpse marked as G.H. inside the facility known as The Guest House, Phil Coulson asked Lady Sif which of the many alien species she had previously encountered was blue.

Centaurians were one of the races she mentioned, but she added that the Centaurians have never been on Earth.

Characteristic traits
Centaurians are humanoid, with differentiating features such as blue skin and large fin-like appendages on their scalps. They also seem to possess a form of sixth sense perception.

Notable Centaurians

 * Yondu