also since nobody wants to post a suggestion I'll just post some different racial variations of the different species. (i.e. human skin tones range from light tan to dark brown)
KALAKARG:
Kalakarg skin tones range from goldish to green to blue. Their eye color usually contrasts the skin tone, so gold skinned ones would usually have blue eyes, green skinned ones would have gold eyes, and blue skinned ones would have green eyes. That isn't always the case, though, an example being Ereo. Kalakarg skin also gets bumpier as they age.
ICONIAN:
Iconian skin tones range from a pale gray to dark grey. Their eyes are always a jet black color. Mandible length and width also are variable depending on fitness/genes. Facial markings also vary.
LACAMPTU:
Lacamptu skin tones are always a dark grey with little variation. Lacamptu are fitted with prosthetics and implants at birth, and most of them change as they grow, mostly depending on occupation. Lacamptu eye color also varies, commoners having blue to green eyes, and officials usually having red to gold eyes.