Robuta

https://www.worldatlas.com/articles/what-is-a-mud-volcano.html
Mud volcanoes form due to pressure within the Earth.
what ismud volcano
https://www.discovermagazine.com/a-methane-spewing-mud-volcano-gives-sanctuary-to-arctic-seafloor-species-47032
Learn about the Borealis Mud Volcano on the Arctic seafloor and its role in maintaining biodiversity, which is driven by methane emissions.
mud volcanomethanespewinggivessanctuary