Luxan

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

Physiology
Standing at an average height of over 6 feet tall, they posses 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 atributed to males, they are prone to something called "Hyper Rage" which sends them into a wild and violent frenzy particularly towards other males.