NeonEdgelord's Hibernal Den

The abyss (abyssopelagic zone) is the middle layer of the deep ocean, and acts as a sort of capital for the lair. Its name comes from the Greek word abyss which means “no bottom.” True to its name, there was a time when the ancients believed that the ocean was a bottomless void. It extends from 4,000 meters down to 6,000, which for some global regions marks the seafloor. There is a startling lack of life in the abyssopelagic zone; only a select few creatures can survive.