Per 
Item #: SCP-5418
Object Class: Euclid
Special Containment Procedures: SCP-5418 is contained within a 10³ chamber filled with water. The only entrance to the SCP’s containment chamber is located in the roof, being a iron trapdoor. There is a window (glass 50 millimeters) located in one of the water chamber’s wall, giving a direct vision to SCP-5418 containment, made so the personnel can take notes about SCP-5418's behavior. Its relocation needs to be made by two armed personnel, in a minimum size 2³ water tank. The chamber’s food needs to be replaced four times a day and the entire chamber's maintenance weekly.
The containment doesn’t need patrol or armed personnel guarding it. At least three Class-D are required to do the chamber maintenance and food replacement.
Description: SCP-5418 is a large creature, measuring about 2.2 meters. Subject seems like a large sized hippocampus, with horns located 2 centimeters above the creature’s unique, and black eyeball. The head has a round shape, and its mouth, extremely disproportionate compared to its head, has a funnel like format, with several rows of teeth. SCP-5418 has two arms, and its shoulders are located a bit down compared to normal human shoulders. Its diet is based on fishes, aquatic mammals, and if the subject doesn’t seem to eat for more than a week, other living things, like humans.
The subject doesn’t seem aggressive to the facility’s personnel, with some exceptions. If the personnel try to interact to SCP-5418 while he is eating, he will try to attack the personnel and protect his obtained food. If SCP-5418 doesn’t eat makes more than a week, he will attack and eat everything that seems alive to him.
Note: Never let SCP-5418 without food.
An experiment lead by Dr.█████ and assisted by D-5491, gave the conclusion that the SCP-5418 has around 80 IQ. The subject passed through test like: fitting toys, math questions using common objects as rocks, science questions, etc. The construction of the entire puzzle chambers, etc. was lead by █████, ███████, and ████. SCP-5418 doesn’t seems to have vocal chords, but it seems that he understand basic english (See Addendum SCP-5418-A.)
It sometimes attempts to escape containment trough the iron trapdoor when personnel enter the chamber. In the day ██/██/████ D-3893 ended hurt when SCP-5418 jumped over him and run away from the containment. The Mobile Task Force re-captured him around 10 minutes after the incident, bringing the subject back to the containment chamber.
Addendum 5418-B2: Portion of the recorded transcript of █████.
<Begin Log>
Dr. █████: Why did you tried to leave the containment?
SCP-5418: (Stares at Dr. █████.)
Dr. █████: Can you explain?
SCP-5418: (Writes “Hunger” using the tail on the chamber’s floor)
<End Log>
(Dr. █████ didn’t extracted any other useful information from SCP-5418 after this part of the recording.)
Addendum SCP-5418-C2:The following experiment went extremely dangerous and 2 two days after the experiment Dr. [EXPUNGED] got expunged from SCP Foundation. If SCP-409 had crystallized completely SCP-5418, subject could be neutralised.
Dr. [EXPUNGED] attempts to use SCP-409 on SCP-5481, to prove the theory that the subject has unknown powers related to him (See Addendum SCP-5418-A2).
0600: SCP-409 is presented to SCP-5418. The subject doesn’t seem to care about it.
0700: The subject touches SCP-409 with his hands. Almost immediately the crystallization begins. SCP-5418 shows extreme pain.
0715: SCP-5418 begins to stare at the crystallization located on his arm.
0725: SCP-409 crystallization took over SCP-5418’s arm. SCP-5418 continues to stare at the crystallization.
0730: The crystallization begins to retreat (No reason discovered.)
0750: SCP-5418’s arm comes back to normal. Still little little traces of crystallization.
0800: SCP’s personnel enters into the containment chamber to lock SCP-409 again and get attacked by SCP-5418. No one gets injured. (Maybe ██████ ██ ███ █████?)
There are two theories as how SCP-5418 stopped (and retreaded) the crystallization:
The subject is able to make all matter in his field of view come back to their old states (of matter). This theory makes sense if compared to Addendum SCP-5418-C1;
The subject is able to regenerate his body (Like SCP-682).
None of them are proved yet.
