The abyssal zone lies partially in the dysphotic and partially in the aphotic zones.
From the en.wikipedia.org
It lies in the hadal zone beyond the abyssal zone, and plunges down to a water depth of around 11 kilometres.
From the sciencedaily.com
The abyssal zone is the abyssopelagic layer or pelagic zone that contains the very deep benthic communities near the bottom of oceans.
From the en.wikipedia.org
The majority of species still live in the oceans, from the seashores to the abyssal zone, but some form a significant part of the freshwater fauna and the terrestrial ecosystems.
From the en.wikipedia.org
The abyssal zone covers the abyssal plains between 4,000 and 6,000 m. Lastly, the hadal zone corresponds to the hadalpelagic zone which is found in the oceanic trenches.
From the en.wikipedia.org
Abyssal seafloor communities are considered to be food limited because benthic production depends on the input of detritalorganic material produced in the euphotic zone, thousands of meters above.