From the Stars Without Number Compatible – Alien Database
Blood Drain. If the leech scores a hit with its bite, the target must make a successful Evasion/Dexterity saving throw. If the saving throw fails, then the target loses 1d4 points of constitution also.
COMBAT & TACTICS
Giant leeches are not intelligent and do not have tactics. They attack in swarms every living being that comes within range, and when food is scarce, they eat their kin. A protective suit can easily prevent the leech from reaching the skin, but an ordinary civilian suit is easily pierced by the numerous and extremely sharp microteeth that fill its mouth. Some specimens may develop colorful pigmentation to attract or warn predators, other specimens are known to have developed mimetic traits to lure prey with pheromones, sounds, and scents.
DESCRIPTION
Giant leeches are slug-like creatures that favor wet and swamp-like terrains. They measure from 0.5 meters to 1.5 meters, but a specimen of smaller and larger size may evolve if the environment is more or less rich in biomass. Their color usually adapts to the environment they inhabit. A giant leech’s mouth may vary in shape and size.
HABITAT
Swamp, marshes, lagoons, and shallow liquid masses are the main hunting ground of giant leeches. These creatures are known to evolve in almost any world that has liquid compounds and proper atmospheric pressure. Water, ammonia, and liquid hydrocarbons are all good candidates. As carbon-based creatures, they favor liquid water, and scientific researches confirm this statement because the largest specimen has been cataloged on water-based worlds.
BIOLOGY
Giant leeches biology is very simple, and their only purpose is to feed and reproduce. They have no military or medical application worth to be mentioned. They are considered an infestation to be eradicated as soon as possible before they run out of control. However, they have proven to be extremely resistant to radiation but very vulnerable to salt compounds. Some scientists claim that they can employ the giant leech’s “liver” as a bio-filter to cure radiation poisoning.