Per 
Item #: SCP 4751
Object Class: Euclid
Special Containment Procedures:
SCP 4751 is to be subject to the same containment procedures as SCP 4750 however any abnormal activity or behaviour is to be immediately reported to the reaserchers and level 04 personnel on site, the containment procedures are then to be edited accordingly.
Description:
SCP 4751 is a extremely large worm like creature with multiple eyes located at the bottom of the main cavern beneath SCP 4750’s containment area in a unidentified black liquid which seems to be mostly harmless, however it does bear striking resemblances to blood. It is a deep black colour making it hard to observe, SCP 4751 also has very thick scales which are extremely hard to penetrate, it has a large mouth spinning mouth which it seems to use to create new tunnels or caverns. SCP 4751 Secrets a clear liquid through its skin which seems to contain the mutagenic virus responsible for SCP 4750. SCP 4751 posseses the intelligence of an average adult and does seem to be sentient. Much of SCP 4751‘a lifestyle and biology is a mystery as is the answer as to how SCP 4751 infected it’s first victim as there is no sign of it ever being present in SCP 4750’s containment or if it even knows it carries a mutagenic virus.
Addendum SCP 4751-1:
SCP 4751 has recently been confirmed to be approximately 2,000 kilograms with an estimated length of at least 40 kilometres.
Addendum, SCP 4751-2:
SCP 4751 although the age of SCP 4751 is unknown close examination of its caverns has led reaserchers to believe it is hundreds of years old, the caverns have also been confirmed to be unnaturally formed. It is hypothesised that SCP 4751 possesss neglected scenescence, this has been further enforced by SCP 4751‘s extreme renerative abilities which were witnessed when it was shot several times by the Nine Tailed Fox expedition party sent to explore the caverns. SCP 4751 regenerated the wounds in seconds and killed most of the exploration party.
Addendum SCP 4751-3:
SCP 4751 does not appear to have a drive to kill or infect anyone as it has not made any attempt to venture out to the surface or shown much hostile activity, it is possible SCP 4751 infected its victims unknowingly.
Addendum SCP 4751-4 Discovery:
SCP 4751 Was discovered after successful drone and personnel expeditions to he caverns below SCP 4750’s containment.
