Tyranno Fin, aquatic predatory life form. Native to Planet Nilfeheim . Tyranno Fins are the largest known predatory fish in the known galaxy. Tyrannos are extremely aggressive and dangerous
The fish is commercially hunted.
Men who hunt these fish are considered an Elite among men on Nilfeheim.
The Mark is a yellowish area of skin behind the eyes of a Tyranno Fin . It is the only spot where a Tyranno Fin Hunter can aim a Slayer Harpoon to kill the Tyranno Fin.It marks the spot of a sinus-like cavity in the Tyranno’s skull where the harpoon can penetrate deep and hit the brain of the fish.