The Serrakin are an alien race that live on the planet Hebridan.
Overview
Serrakin appear to be a reptilian species, humanoid in shape but having scaled skin and reptilian-like eyes. They are capable of speaking English and interbreeding with normal humans. Half-Serrakin possess the distinctive bone structure of regular Serrakin, but have lighter skin which does not appear to be scales. (SG1: "Forsaken")
The Serrakin live in peace with Hebridian, who they freed from the Goa'uld thousands of years ago. Interspecies marriages are fairly common. There were some who believe that the Serrakin are oppressing the human population subtlety and trying to control them, though what merit, if any, these claims has is not shown. The entire economy largely seems to depend on the Tech Con Group, a conglomerate which produces nearly every product imaginable. Not all Serrakin appear to be remain on their home planet, as some Serrakin are shown to be bounty hunters. (SG1: "Space Race", "Bounty")
History
The origins of the Serrakin people themselves are unknown. Thousands of years ago they came before their current homeworld and liberated the people there from the Goa'uld, suggesting that, at least on a small scale, they were capable of challenging the Goa'uld. Curiously, they did not know the purpose of the Stargate despite this victory over the Goa'uld. After this period, the Serrakin integrated with this branch of humanity and lived in harmony. As part of this union, the Hebridians were given the advanced technology of the Serrakin race.
Earth came into contact with the Serrakin on the planet P2X-005 when SG-1 encountered a crashed Serrakin vessel. However, the Hebridan prisoners of the ship tricked the SGC into believing that the Serrakin were a hostile race of native savages that killed their crew. The surviving members of the crew included Warrick, who managed to tell SG-1 the truth and together they managed to apprehend them which began a limited level of contact between Earth and the Serrakin race. It was here that Warrick, and later the rest of his people, learned of the Stargate. (SG1: "Forsaken")
Despite this, diplomatic contact between Earth and the Serrakin continued but had been slowed to a degree. Warrick unofficially allowed a level of technological exchange to occur between the two by asking Samantha Carter to help him win the race at the Loop of Kon Garat. This allowed SG-1 to visit Hebridan on a diplomatic basis. (SG1: "Space Race")
The fate of the Serrakin race remains unknown after this point. The Ori crusade against the Milky Way galaxy claimed Hebridan, though no mention is made as to the outcome of the conquest (conversion of extinction). Assuming they converted or survived, they would have been be able to prosper once more when the crusade was ended. (SG1: "Flesh and Blood")