Beyond this depth is the area known as the abyssal zone.
The width of the mountain is 4-6 times greater than that of most abyssal hills.
The Brother Islands are a solitary outpost, rising like twin towers from the abyssal depths.
Sardine and squid do not inhabit abyssal plains.
Bottom-living marine-invertebrate species are not scattered randomly across the sea floor from the high-tide line to abyssal depths.
The near-constant depth of the abyssal sea floor indicates that the lithosphere thickens to roughly 100 km in 70 million years, but then ceases to grow.
Bathyal is defined as pertaining to the ocean bottom between the sublittoral and abyssal zones - from depths of approximately 200 to 400 m.
These fish live in the abyssal plains, flat expanses of the ocean floor at depths of 10,000 to 20,000 feet.
The fluids that emerge may come in bursts when earthquakes occur; fluid flow may therefore repeat episodically over hundreds of thousands of years as abyssal hills are uplifted and spread away from the mid-ocean ridge crest.
He often combined his talents, whether it were to soothe the weary souls at the local pub or fell an ice dragon in the depths of the abyssal caverns.