 Item No. SCP-153 Object Class, Euclid Special Containment Procedures Specimens of SCP-153 are to be kept isolated in acid-resistant containers, measured no less than 10m x 10m x 5m, partially filled with sewage and organic material, at Bio-Research Area-12. Every four hours, both the level of organic content and the structural integrity of each container must be checked. Under no circumstances are these containers to be connected to any internal or external plumbing system. Specimens of SCP-153 almost certainly still exist in the wild. Any reports of people mysteriously disappearing from showers and bathtubs must be investigated immediately. Agents must be equipped with infrared and ultra-violent sensors to circumvent SCP-153's camouflage. Agents should be brought alive to Area-12 if at all possible. Description SCP-153 appears to be a species of nematode, groundworm, that can reach up to ██ meters in length and ██ centimeters in diameter. Specimens of SCP-153 live in sewers and drain pipes, and while specimens of SCP-153 can live off of most any organic material, they prefer them to consume animal tissue. As the SCP-153 is screed a highly acidic substance similar to ██ from their mouths and gullets, and they have the ability to camouflage themselves both outside and in. SCP-153 is developed a hunting technique where a specimen will swim up a shower or bathtub drain, dissolve the drain cover with acidic saliva, and camouflage his gullet to look like a standard drain. Shortly after a human enters the shower or bathtub, the specimen ██ back down the drain, leaving almost nothing behind. The entire process usually takes less than ██ seconds. Addendum 15301 Specimens of SCP-153 are to be kept isolated from each other except under controlled breeding conditions. Dr. Kobalyskia Addendum 15302 Incidents in ██ suggest that specimens of SCP-153 have started attacking people through sink drains, toilets ██ researchers are investigating how such an apparently simple animal can develop such relatively sophisticated hunting techniques. Addendum 15303 Dr. Kobalyskia has received approval to start a breeding research program with SCP-153 with emphasis on genetic engineering. The program ██ as well as a potential method of organic waste disposal. Addendum 15304 A controlled release of SCP-153 instances has been proposed as a potential containment method for stalling the spread of SCP-2717. Approval Pending