Zones in the ocean.
There are four major zones of the open ocean biomes, which are grouped as such: the intertidal zone, the pelagic zone, the benthic zone and the abyssal zone. The environments found in each vary greatly, and they play host to a diverse population of ocean flora and fauna.
The two subzones making up the Benthic zone is the abyssal and hadal
Abyssal plain is an underwater plain on deep ocean floor, usually found at depths between 3000 - 6000 meters. Abyssal zone is abyssopelagic layer of pelagic zone. Contains very deep (4,000 to 6,000) benthic communities near bottom of oceans.
The 5 ocean zones are: 1. Sunlight zone 2. Twilight zone 3. Midnight zone 4. Abyssal zone 5. Hadal zone These zones are according to the depth of the ocean. 
Abyssal plain is an underwater plain on deep ocean floor, usually found at depths between 3000 - 6000 meters. Abyssal zone is abyssopelagic layer of pelagic zone. Contains very deep (4,000 to 6,000) benthic communities near bottom of oceans.
Euphotic, sunlight, epipelagic zone
The Abyssal Zone is one of the many benthic zones we have highlighted to describe the deep oceans. This particular zone is found at depths of 2,000 to 6,000 meters (6,560 to 19,680 feet) and stays in perpetual darkness.
you mean euphotic zone...
There are two major ocean zones, Pelagic and Benthic zones. The Pelagic zone is the open ocean and the Benthic zone is the ocean bottom.
The abyssal zone
Starts at the continental shelf, and continues down the continental slope to the abyssal plain,the pressure increases as you go downthe organisms decrease as the pressure increases
Yes there are carnivores in the benthic zone. The scavengers in the benthic zone are considered carnivores because the eat the dead aquatic animals that float to the bottom when they die. There are also some carnivorous fish in the benthic zone.