Balok's species
From Memory Alpha, the free Star Trek reference.
Balok's species were a humanoid race from the Alpha or Beta Quadrant and members of the First Federation. In their initial appearance to the crew of the USS Enterprise, Balok, a member of this species, appeared to be a bluish, cat-eyed alien. In his true form, he resembled a Human child. (TOS: "The Corbomite Maneuver")
 The puppet Balok |
 The real Balok |
