This area is called the aphotic (or no-light) zone.

The deep-water zone does not have photosynthesis since there is no sunlight.

In the aphotic zone (consisting of the Midnight Zone and the Abyss) there is not enough light for photosynthesis.

Depending on the definition, the mesopelagic zone may or may not be included in the aphotic zone. © Finlay McWalter, Wikimedia public domain

Below 1% of the surface incident light, the photic zone ends and the aphotic zone begins.

The various different zones include pelagic zone (all open oceans regions), photic zone (surface to 200 meters down) and aphotic zone (depths exceeding 200 meters).

The various different zones include pelagic zone (all open ocean regions), photic zone (surface to 200 meters down) and aphotic zone (depths exceeding 200 meters).

This informal program of naturalist exploration has for forty years been targeting the intertropical zone, mainly in the Indo-West Pacific.

The next zone is the disphotic zone, which extends from about 50 meters, or wherever the euphotic zone ends, to about 1,000 meters.

A later definition of this term, which is more radical, defines the aphotic zone as the portion of the ocean where total darkness reigns.

Lanternfishes (or myctophids, from the Greek mykter, "nose" and ophis, "serpent") are small mesopelagic fish of the large family Myctophidae.

The vampire squid is an extreme example of a deep-sea cephalopod, thought to reside at aphotic (lightless) depths from 600 to 900 metres (2,000 to 3,000 ft) or more.

The sperm whale and Southern elephant seal are able to dive into the aphotic zone to hunt, even though the intense water pressure squishes their bodies.

The vampire squid is an extreme example of a deep sea cephalopod, thought to reside at aphotic (lightless) depths from 600 to 900 metres (2,000 to 3,000 ft) or more.

Lanternfishes (or myctophids, from the Greek μυκτήρ myktḗr, "nose" and ophis, "serpent") are small mesopelagic fish of the large family Myctophidae.