2.000 - 8.000 kilometers

Special Containment Procedures: Because of its size, SCP-169 cannot and almost certainly will never be contained. SCP Foundation focuses on monitoring and preventing human interaction with the creature. no structure on earth is large enough or strong enough to contain SCP-169.

Southern Atlantic Ocean. 

The exact location of SCP-169 is unknown due to its extremely slow movement and vast size. However, unofficial reports from the Foundation suggest that its “body” may currently form part of a remote island chain in the South Atlantic Ocean. Attempts to observe SCP-169 via aerial or underwater reconnaissance often fail due to sudden electromagnetic interference or extreme weather anomalies. But imaging satellites and analyses of eccentricities in the Earth's orbit suggest SCP-169 is located in the southern Atlantic Ocean, possibly stretching around the tip of South America.

Thought to have existed since the Precambrian era. 

The Precambrian Era is the earliest and longest span of Earth’s history, covering about 88% of geological time. It lasted from the formation of the Earth around 4.6 billion years ago up to 541 million years ago, just before the Cambrian Period. 

Very slow, less than one kilometer per week

Dormant/inactive

SCP-169 is believed to be in a near-constant dormant state. However, slight shifts in its body such as slow, rhythmic “breathing” movements or gradual repositioning are capable of generating tsunamis, coastal shifts, and even large-scale undersea earthquakes. The entity does not exhibit hostile behavior, but the sheer impact of its existence poses a severe geophysical threat. 

Massive. 

Ancient marine arthropod. 

Not many know about SCP-169's behaviour, such as reproduction, food source, or nesting area. 

Dissemination of any information related to SCP-169 is strictly prohibited. 

All satellite imagery, scientific reports, and geological documents showing anomalies linked to SCP-169 are to be censored or revised in accordance with Foundation protocols.