BBC Earth (June 28, 2023) – A kilometre beneath the surface and beyond the reach of the sun, life can still flourish in this dark expanse.

The midnight zone is the single largest habitat on the planet, accounting for 70% of all seawater, but because of its remote location, it is poorly understood. Little is known about the animals that inhabit these waters, and even less is known about microbial life in this zone.