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The bathypelagic zone or bathyal zone (from Greek βαθύς (bathýs), deep) is the part of the open ocean that extends from a depth of 1,000 to 4,000 m (3,300 to 13,000 ft) below the ocean surface. It lies between the mesopelagic above and the abyssopelagic below.
Linophryne arborifera, or the illuminated netdevil, [2] is a deep-sea anglerfish of the family Linophrynidae, found in all tropical and subtropical oceans at depths below 1,000 m (3,300 ft) in the Bathyal zone. Like many ceratioids, the female is significantly larger than parasitic male.
Acantholiparis caecus is known from depths stretching from 1,300m to 2,122m, in the bathyal or midnight zone of the ocean. [2] Unlike the spiny snailfish, it is pelagic, living above the ocean floor rather than upon it as the demersal spiny snailfish does. [2]
Ipnops is a genus of deep-sea fish in the family Ipnopidae, which also includes the better-known tripodfish (Bathypterois grallator). Ipnops are small, slender fish that live close to the ocean floor in the bathyal and abyssal zones. The genus is notable for its unusual eyes.
Linophryne indica, or headlight angler, is a leftvent anglerfish in the family Linophrynidae, found in the bathyal zone of the Pacific Ocean at depths below 1,000 m (3,300 ft). The female is significantly larger than the mature male.
The Dana Viperfish is mostly found in the bathyal zone. The species was first caught and recognised on the Dana expeditions 1920-1922 and named after the research vessel Dana . [ 1 ]
The aphotic zone is further divided into the mesopelagic, bathyal, abyssal, and hadal zones. The mesopelagic zone extends from 200 metres (656 ft) to 2,000 metres (6,562 ft). The bathyal zone extends from 2,000 metres (6,562 ft) to 4,000 metres (13,123 ft).
The bathyal zone is the lower section of the midwater zone, and encompasses the depths of 1,000 to 4,000 metres (3,300 to 13,100 ft). [23] Light does not reach this zone, giving it its nickname "the midnight zone"; due to the lack of light, it is less densely populated than the epipelagic zone, despite being much larger. [ 24 ]