Per 
Lake Urmia turning red, speculating to be caused by several instances of SCP-XXXX
Item #: SCP-XXXX
Object Class: Euclid
Special Containment Procedures: SCP-XXXX is to be contained inside a locked container. It is to be fed with algae and having its water replaced twice a week. To avoid sucking up SCP-XXXX when draining water, a Class D-Personell is instructed to enter its containment to perform any kind of physical action, even talking, to keep SCP-XXXX's attention. Water salt level is to be at a steady 18%.
Description: SCP-XXXX is a potentially dangerous sentient red mass of extremely dense liquid obtained from lake Urmia located in Iran weighing in an average of 72 kilograms. Minimum weight has been measured at 58 kilograms with a maximum at 102. It preys upon algaeblooms and rests in water where it dissolves and defecates. SCP-XXXX will mimic any living being that comes near it and catches its interest. It will duplicate the target's appearance flawlessly and proceed to mimic every single action its target does, including speech. SCP-XXXX will wait patiently for its target to finish its action before performing it the exact same way, often waiting to use the very same tool its target has been using. The entity refuses to use duplicate items, insisting on using the precise items its target has used. SCP-XXXX will keep at a reasonably distance of 2 to 5 metres and avoiding direct contact with its target. If SCP-XXXX's target remains still for too long, this around a minute, SCP-XXXX will loose interest and return to its liquidous state and leave. SCP-XXXX's vocal mimicry will start after 3 seconds repeating exactly what its target says, rendering conversations nearly impossible as SCP-XXXX will speak and interupt its target. The first confirmed documentation of SCP-XXXX as sentient was when D-████ opened a door and passed without closing whereupon SCP-XXXX slammed the door shut to open it the exact same way as D-████. Tests have shown that if SCP-XXXX's target turns in a tight corridor, SCP-XXXX will turn into its usual state and slither between its target's legs to stand behind it. This is one of the few instances where it willingly will come into direct contact with a more complex biological organism. Tests have been conducted where a D-Class personnel where locked with SCP-XXXX in its containment with a lightswitch, whereupon the lights where shut off remotely without the D-Class even nearing the switch to leave the containment in complete darkness. SCP-XXXX in this instance turned on the lights using the lightswitch to be able to see the D-Class personnel. Further tests involved locking the room with a D-Class personnel together with SCP- and nightvision goggles placed between them. After having been left in darkness for 60 seconds before turning on the lights. SCP-XXXX was confirmed wearing the nightvision goggles to see its target whereafter it quickly threw them away. A suicide test was conducted with an empty pistol. When Class D was instructed to aim at his head and pull the trigger, SCP-XXXX slapped the weapon out of his hand and immediately lost interest. SCP-XXXX shows consistency with its weight before and after transformation. Several tests have been conducted to try aggressiveness with few positive results. SCP-XXXX rarely exhibit hostile behaviour and will escape such circumstances, usually by dissolving into water. Only instances of it turning physically violent (see SCP-XXX-A16) is if its target still holds onto an object after two minutes of multiple actions, on this instance SCP-XXXX will by force snatch the item out of its targets hands to mimic. There was a breach accident following SCP-XXXX leaking into a drainage. It was found following Dr.█████ and recontained with no further breaches. There has been no successful attempts of making SCP-XXXX talk on its own accord.
Addendum: Log SCP-XXXX-A6: Evaluation on auditory mimicry. Log SCP-XXXX-A11: Physical/Ergonomical mimicry unveiling sentient behaviour. Log SCP-XXXX-A16: Provoking aggressive responses.
SCP-XXXX-A6 Auditory Mimicking Test
<Begin Log>
Dr. Anders: How do you feel, D-████?
D-████: Fine.
Dr. Anders: (Waiting for SCP-XXXX's response).
SCP-XXXX: (Repeats D- after 3 seconds) Fine.
Dr. Anders: Surely you must feel more than that, D-████. What are you thinking about at the moment? What is your opinion about me? The foundation? SCP-XXXX?.
D-████: Ah, well doctor. I um, I don't know what I'm expecting of this-
SCP-XXXX: (Starts repeating D-████ initial speech in the exact same way)
D-████: -this-THIS FREAK- (SCP-XXXX continues mimicking, causing D-████ to loose focus and seizing to speak) -I can't… Shit!
SCP-XXXX: -THIS FREAK. I can't… Shit!
D-████: (Refuses to speak further)
Dr. Anders: D-████, please answer my questions.
D-████: (Screams) YOU'RE SHIT! THE FOUNDATION'S SHIT! THE-
SCP-XXXX: (Starts screaming the same way as D-)
D-████: -SHUT THE FUCK UP!
Dr. Anders: That concl-
SCP-XXXX: SHUT THE FUCK UP!
Dr. Anders: (Repeats himself after having been distracted) That concludes auditory log SCP-XXXX-A6.
<End Log>
SCP-XXXX-A11: Physical/Ergonomical Mimicking Test
<Begin Log>
Dr. Anders: D-████, could you please open the door and pass without closing?
D-████: (Opens the door and passes according to instruction)
SCP-XXXX: (Violently closes the door in a loud smash, startling D-████).
D-████: Holy… (SCP-XXXX proceeds to open the door the exact same way as D-████)
Dr. Anders: (Chuckles of microphone) You little mimicking monkey. That made you mad, huh?
Dr. Anders: (Clears throat and approaches mic to record) SCP-XXXX has shown potentially sentient behaviour and will be classified as Euclid until more concluding tests have been established. (Leans back in chair) This just got a whole lot more interesting.
<End Log>
Closing Statement: SCP-XXXX will be conducted for further sentience tests.
SCP-XXXX-A16 Provoking Aggressive Responses
<REDACTED>
