Per 
Item #: SCP-XXXX
Object Class: Safe
Containment Procedures: SCP-XXXX is to be kept in a light containment humanoid cell and is not to be allowed to move about the lower levels of the facility due to their invisibility being a hazard to it, and the staff. Its cell is to be lit with lights at a brightness no greater than ~15.57 lumens or lower than ~0.34 lumens. It is to be fed the same diet as SCP-529. Its cell is to be fitted with the regular amenities of a standard house cat, featuring a bed, food dish, and water dish. The room is to have a 25-inch television to that is to play live security footage from outside Site-17 to keep it happy so that testing may continue smoothly. The room is to be fitted with infrared cameras to help see it in the event where the full lights must be turned on. SCP-529 is not to be allowed near any objects that are to be brought into SCP-XXXX's room, as to not get her scent on them. An appeal has been filed to transfer one or the other to another site to avoid conflict and save on the resources used to keep them apart.
Description: All that can be seen of SCP-XXXX is a pair of tapetum lucidum1 that can only be seen when there are no lights greater than ~15.57 lumens or lower than ~0.34 lumens present in the room. The eyes resemble that of a common house cat of indeterminate breed or age. When light greater than ~15.57 lumens are present, it is impossible to see SCP-XXXX's full body. It was theorized that using silhouettes might be able to be used to view SCP-XXXX's body, however, it seems that SCP-XXXX's entire body, other than its tapetum lucidum may not exist in this dimension, or somehow not be visible on the UV light spectrum. SCP-XXXX has been given a normal cat collar with a bell and tracker that is to wear at all times.
SCP-XXXX was discovered on level 5 of Site-64 at 0143 hours on August 8th 2011 when Dr. Morris felt a then-unknown entity brush against his leg in the staff lounge as he was preparing a two-day old smoked salmon in the microwave. This made him drop the food onto the ground, splashing some of the juices onto SCP-XXXX, revealing it. He quickly closed the door to the staff lounge and alerted MTF of a containment breach. After asking Dr. Morris to describe the SCP it was discovered that it did not match the description of any SCP currently residing in Site-64. Containment specialists arrived and temporarily put SCP-XXXX into the nearest empty heavy containment cell. SCP-XXXX appeared to be slightly malnourished at the time of containment as they ate four servings of the Fancy Cat Chunky Chicken Pate cat food that was on-site.
After it was determined that SCP-XXXX shared many similarities with a common house cat, researchers were able to determine that it was a female of indeterminate long-haired breed. Further testing revealed that it seems to be able to eat any organic matter given to it without issue. SCP-XXXX seemingly does not produce any waste. Original theories suggested that its waste was invisible to the naked eye but this has been proven false, as the infrared camera shows no heat signatures resembling fresh waste at any time and SCP-XXXX does not seem to make an effort to void waste matter at all. Ultrasounds show that its bowels are empty and seems to transform its food into pure energy for itself, leaving no waste.
Test #1 - 5/2/2012
Subject: SCP-XXXX and a confirmed non-anomalous tabby cat of the opposite gender, as to not incite conflict .
Procedure: SCP-XXXX's collar is to be removed and the cell's standard lights are to be turned on to render SCP-XXXX invisible. The non-anomalous cat is to be inserted into SCP-XXXX's cell to see if it can locate SCP-XXXX.
Results: The non-anomalous cat was able to locate SCP-XXXX but appeared to become confused and hostile when it realized that it could not see SCP-XXXX.
Analysis: non-anomalous cat was able to locate SCP-XXXX using scent but was not able to see SCP-XXXX with its eyes.
Test #2 - 5/8/2012
Subject: SCP-XXXX and SCP-529
Procedure: SCP-XXXX's collar is to be removed and the cell's standard lights are to be turned on to render SCP-XXXX invisible. SCP-529 is to be inserted into SCP-XXXX's cell to see if SCP-529 can locate SCP-XXXX
Results: SCP-529 was able to locate SCP-XXXX but did not seem to be interested beyond the initial introductions. SCP-529 went up to SCP-XXXX and only sniffed SCP-XXXX who hissed, which caused SCP-529 to lose interest in SCP-XXXX and investigate the cell, which is when SCP-529 was removed from the cell and a new rule was put in place to keep the two apart in non-testing environments
Analysis: SCP-529 was most likely able to locate SCP-XXXX using scent although SCP-529 was seemingly not distraught by the inability to see SCP-XXXX, like the cat in the first test. This may suggest that SCP-529 might be able to see more than UV light.
SCP-XXXX is currently residing in Site-17 and has cooperated well with researchers.
