Luxan

Luxans are a humanoid mammalian warrior species from the Farscape universe.

Physiology
Standing at an average height of over 6 feet tall, they possess great strength to match their height. They also have a poisonous tongue which is prehensile. Another feature is that their blood, which bleeds black at first, must turn clear before the wound can heal, otherwise it will turn poisonous and the Luxan will die.

Seemingly only attributed to males, they are prone to something called "Hyper Rage" which sends them into a wild and violent frenzy particularly towards other males.

Culture
The Luxans are known as great conquerers and follow a (some what archaic) warrior culture. This culture involves the use of a sword that doubles as a rifle called a Qualta.