A variation of octarians that have been sanitized or "disinfected". They have a different coloration, depending on their "level of sanitization". Their skin is pale green/blue, they have black sclera with neon-blue pupils, and their hair has a blue color, sometimes with a green gradient.
They lose all level of free will, acting as slaves or robots on the testing grounds, and also seem to have no pulse, which could mean that they are already dead.
A prime example is Dedf1sh or the octoling enemies found in Splatoon 2: Octo Expansion, from which they originated.