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Description

SCP-511 is always found associated with a colony of feral Felis domesticus, common domestic cats. Members of this colony are designated SCP-511-1.
SCP-511 is a mass of biological matter taking the form of a large feline, often with extra limbs, eyes, mouths or other organs. It is typically coated with dirt, blood and fecal matter, making its fur appear black despite its actual coloring. (Tests have shown SCP-511’s fur to actually be a random patchwork of various feline coat patterns, colors, and lengths.) SCP-511’s mass varies from 10kg to over 50kg, roughly in proportion to the number of SCP-511-1 in the associated colony. The tissue that makes up this mass consists primarily of the bodies of deceased SCP-511-1. The portion of SCP-511 that does not comprise SCP-511-1 consists of other biomass; small rodents, various plant materials, insects and insect larvae, black mold, a human [DATA EXPUNGED]. Incorporation of dead tissue into SCP-511 does not appear to slow the normal process of decay. Different areas of SCP-511 undergo different stages of biodegradation at any given time; some areas show little more than lividity, while other areas may show active carrion insect infestation, and some areas may even show liquefaction of tissues. (Note: Researchers have described SCP-511 making a “purring” sound. Tests have shown this sound does not originate with SCP-511, but is actually the sound of insects, most often blowflies, trapped within its mass— Dr. A. ████)
SCP-511 prefers to inhabit dark spaces with a relatively high humidity, such as old basements and crawl spaces. It will continually scavenge its immediate area for new biomass to incorporate into itself, displacing and expelling matter that has decayed past mechanical usefulness.
Examples of SCP-511-1 resemble ordinary Felis domesticus that have undergone extreme neglect. They display a body condition score of 2 or 1, regardless of the amount of food available. Ulcerated skin is common, as are parasitic infestations, tumors, and various viral and bacterial infections. (SCP-511-1 are known carriers of a particularly virulent strain of ███████ ██████.) A typical SCP-511-1 shows no interest in grooming itself, and has patchy and matted fur. It is unclear to what extent the physical condition of an SCP-511-1 is a result of the influence of SCP-511, and to what extent it is due to sub-optimal living conditions.
Several observations have been made of an SCP-511-1 retrieving biomass from elsewhere and bringing it to SCP-511 to be incorporated.

Description

SCP-511 is always found associated with a colony of feral Felis domesticus, common domestic cats. Members of this colony are designated SCP-511-1.
SCP-511 is a mass of biological matter taking the form of a large feline, often with extra limbs, eyes, mouths or other organs. It is typically coated with dirt, blood and fecal matter, making its fur appear black despite its actual coloring. (Tests have shown SCP-511’s fur to actually be a random patchwork of various feline coat patterns, colors, and lengths.) SCP-511’s mass varies from 10kg to over 50kg, roughly in proportion to the number of SCP-511-1 in the associated colony. The tissue that makes up this mass consists primarily of the bodies of deceased SCP-511-1. The portion of SCP-511 that does not comprise SCP-511-1 consists of other biomass; small rodents, various plant materials, insects and insect larvae, black mold, a human [DATA EXPUNGED]. Incorporation of dead tissue into SCP-511 does not appear to slow the normal process of decay. Different areas of SCP-511 undergo different stages of biodegradation at any given time; some areas show little more than lividity, while other areas may show active carrion insect infestation, and some areas may even show liquefaction of tissues. (Note: Researchers have described SCP-511 making a “purring” sound. Tests have shown this sound does not originate with SCP-511, but is actually the sound of insects, most often blowflies, trapped within its mass— Dr. A. ████)
SCP-511 prefers to inhabit dark spaces with a relatively high humidity, such as old basements and crawl spaces. It will continually scavenge its immediate area for new biomass to incorporate into itself, displacing and expelling matter that has decayed past mechanical usefulness.
Examples of SCP-511-1 resemble ordinary Felis domesticus that have undergone extreme neglect. They display a body condition score of 2 or 1, regardless of the amount of food available. Ulcerated skin is common, as are parasitic infestations, tumors, and various viral and bacterial infections. (SCP-511-1 are known carriers of a particularly virulent strain of ███████ ██████.) A typical SCP-511-1 shows no interest in grooming itself, and has patchy and matted fur. It is unclear to what extent the physical condition of an SCP-511-1 is a result of the influence of SCP-511, and to what extent it is due to sub-optimal living conditions.
Several observations have been made of an SCP-511-1 retrieving biomass from elsewhere and bringing it to SCP-511 to be incorporated.