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During the day, trawls at depths between 350 and 600 m (1,100 and 2,000 ft) produce the highest catches and at night the greatest abundance of fish is in the depth range 170 and 400 m (600 and 1,300 ft); this indicates that some, but not necessarily all, fish make short daily vertical migrations. [1]
The latter allow them to use counter-illumination to escape predators that lurk in the depths: by matching the light intensity with the light penetrating the water from above, the fish does not appear darker if seen from below. They typically occur at a few hundred meters below the surface, but their entire depth range spans from 50 to 1,500 ...
The mesopelagic zone is the disphotic zone, meaning light there is minimal but still measurable. The oxygen minimum layer exists somewhere between a depth of 700 metres (2,297 ft) and 1,000 metres (3,281 ft) deep depending on the place in the ocean. This area is also where nutrients are most abundant.
The fish retina has rod cells that provide high visual sensitivity in low light conditions and cone cells that provide higher temporal and spatial resolution than the rod cells are capable of. They allow for the possibility of color vision through the comparison of absorbance across different types of cones. [ 10 ]
However, at nighttime larger viperfish can be found in shallower depths. [6] The eyes of Chauliodus sloani maintain a constant size and proportion throughout growth of the fish. [9] In the retina, several rows of rod cell "banks" grow upon each other, increasing in number with size of the fish. [9]
The eyes of Winteria telescopa differ slightly from those of other opisthoproctids by their more forward-pointing gaze.. Barreleyes, also known as spook fish (a name also applied to several species of chimaera), are small deep-sea argentiniform fish comprising the family Opisthoproctidae found in tropical-to-temperate waters of the Atlantic, Pacific, and Indian Oceans.
Stomiidae is a family of deep-sea ray-finned fish, including the barbeled dragonfishes.They are quite small, usually around 15 cm, up to 26 cm. These fish are apex predators and have enormous jaws filled with fang-like teeth. [1]
The common ling is a demersal species that can be found over rocky substrates from 15 to 600 m or more in depth; it is most common between 100 and 400 m. The juveniles, less than 2 years old, are coastal, occurring in depths of 15–20 m, and pelagic; at 3 years, they migrate to deeper areas. Sexual maturity is attained at 5 years for males, at ...