Linked from
The 10 pages that link to Abyssal zone, each with the reason it gives.
Deep-sea fishRelated: Abyssal fish occupy the deep ocean floor, distinct from open-water species.
Bathyal zoneNarrower topic: It begins below the bathyal zone’s usual lower boundary.
ViperfishRelated: Some viperfish records come from depths near the abyssal region.
Cusk-eelRelated: Certain cusk-eels occur on or near the abyssal seafloor.