The original space-faring lizard-people.

The Gorn are an alien race from the original Star Trek series (Season 1, Episode 19 "Arena"), a bipedal, tail-less green-scaled reptilian with faceted eyes. Plantigrade legs with 4 toes.

Although popular amongst the Trekkies and Furries, the Gorn have had only one fully canonical appearance (the aforementioned "Arena"), with appearances on other shows being of dubious canon.

In non-canonical, licensed works and in fan art, the design of the Gorn changes rather significantly between works; including changing their leg structure, adding tails of varying lengths, normal-looking eyes, different body colors, and using more standard lizard-like heads.