 SCP-055 is a self-keeping secret, or anti-meme. Information about SCP-055's physical appearance as well as its nature, behavior, and origins is self-classifying. To clarify, how Site-19 originally acquired SCP-055 is unknown, when SCP-055 was obtained and by whom is unknown. SCP-055's physical appearance is unknown. It is not indescribable, or invisible. Individuals are perfectly capable of entering SCP-055's container and observing it, taking mental or written notes, making sketches, taking photographs, and even making audio-video recordings. An extensive log of such observations is on file. However, information about SCP-055's physical appearance leaks out of a human mind soon after such an observation.