Per 
Special Containment Procedures: SCP-5237 is to be contained in a 35 m x 35 m x 10 m containment cell with powerful dehumidifiers installed. No liquids are allowed within the containment cell. As no personnel are allowed to enter the containment chamber, maintenance is to be carried out by remote-controlled robots. SCP-5237 is to be kept under observation at all times by cameras. Affected subjects are to be terminated.
Testing is strictly prohibited, violation of this rule is grounds for termination (See Incident-5237-A).
Description: SCP-5237 is a plush toy resembling a Harbor seal(Phoca vitulina). The object is 23 cm in length and 10 cm in height. The inside of SCP-5237 is filled with an unknown liquid of inconsistent and constantly changing density. Mass of the object has ranged from 150 g to 28 kg. SCP-5237 is covered in fur corresponding to Phoca vitulina, Pusa hispida, Erignathus barbatus, Lobodon carcinophagus and Leptonychotes weddellii. The fur has been dyed grey. The fur and the dye are non-anomalous.
Whenever a human resides within 25 m from SCP-5237 or directly observes it, the subject will suffer from the delusion that he/she is a pinniped. Subjects lose the ability to speak and vocalizations become increasingly seal-like. Victims start to move on land by undulation along the ground. 30 minutes after initial exposure, subjects will seek out the nearest body of water capable of accomodating them, and will submerge in it. At this point, subjects are deluded that they can hold their breath for 20 minutes, which will cause them to spend long periods of time underwater, more than they air supply allows. Death is usually caused by drowning. Affected subjects spread the cognitohazard to anyone within a 7 m radius.
Subjects who had made physical contact with pinnipeds at any point in their lives for at least 30 minutes will not be affected by SCP-5237's cognitohazard. Whenever a subject that meets this criterion resides within 25 m from SCP-5237, they will enter a state similar to sleep paralysis, and they do not require any nutrition or hydration in this state. SCP-5237 will teleport any liquid (except those currently in living organisms) in a 30 m radius to the victims lungs, this includes humidity. If no liquids are present within 30 m from SCP-5237, water will slowly materialize around the subject until it completely covers it, which leads to drowning. However this process is extremely slow, taking over 3 weeks to complete.
Discovery: SCP-5237 was discovered on July 20, 1999 in the souvenir shop of [REDACTED] Zoo, after strange behaviors of visitors and deaths of staff assigned to seals. Over the course of 3 days, 4568 similar reports were filed. MTF α-1 was deployed to discover the cause and contain/ retreive it. All 15 members of the detachment were affected by SCP-5237 and had to be terminated. On July 25, 1999, remote-controlled robots were used to locate and retreive the object. Foundation aircraft disguised as civilian airplanes were used to deploy aerosolized amnestics in the area after the mission.
