What's that in the water?
Thank you! For your further enjoyment, I present the Scather...
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VERMIN: "Scather" (SKAY-ther) or "Wrapping Leach"
Found on a few wetworlds corewards of the Spindrift Marches. This creature appears as a large, flat, greenish-brown leaf. Careful observation will reveal a slow, peristaltic undulation that the creature uses for locomotion. If left alone, the Scather will do no harm. But when the scather comes in contact with another creature (non-Scather), it quickly wraps itself around its victim, inserting hundreds of hair-like feeding tubes into the victim's flesh. Small creatures are drained of all organic fluids within a few minutes. Larger creatures suffer a searing pain where the Scather is attached.
Forcibly peeling the Scather from the victim at this phase of attack will either remove portions of the victim's epidermis or leave a few dozen feeding tubes embedded in the victim's skin. Either way, the victim is now exposed to a high risk of infection. Acids, chemical salts, alcohol (50% or better), open flame, or any of the other safe means of removing Terran leaches will cause the Scather to withdraw its feeding tubes and try to escape, leaving its victim with only a nasty "road rash" type of wound. Successful treatment at this stage requires a medical kit and paramedic skill (Medical 2+) or better.
Allowing the Scather to complete its feeding is even more dangerous, for once it is fully sated, the Scather will deposit thousands of eggs, which will hatch into larvae within 3 to 18 hours. These 1mm-long larvae (or "Maggots") which by now have entered the victim's bloodstream, muscles, and organs, will attack and consume the victim from the inside out. Successful treatment of larval infestations requires admission to a medical facility under the care of a doctor (Medical 4+). Cryogenic storage in a low berth will force the larvae to become dormant. An extended stay -- up to a year -- in a low berth may kill up to 98% of the larvae, but the victim must still survive both the low berth and the remaining larval infestation.
Once the victim has died, the larval Scathers go dormant until exposed to moist ground or swampy water, wherein they make their final metamorphosis to their adult form.
Adults range in size from 1cm to 30 cm in length, about half that in width, and never more than 3cm thick. They detect their prey by its scent, motion, and electrical fields, much as does the Terran shark.
Scathers tend to swarm in groups of 3 to 18. They avoid salt water and direct sunlight.
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Sleep well tonight.