Dewi’s Adventures in Hollow Knight: Volume 2, pg 29

Bug Fact: Halicephalobus mephisto is a nematode (roundworm) that is named after Mephistopheles, the Lord of the Underworld and alludes to the fact it is the deepest-living animal EVER found. 3.6 km (2.2 mi) under the surface!!! Pictures and Facts Below.