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The alfonsino has large eyes and a deep, compressed body, 1.9–2.5 times its standard length at the greatest depth. [5] It is a rose red color dorsally and orange ventrally. The rest of its body is silvery-pink, and the breast is yellow-white in color. [4] Fins and the inside of the mouth are bright red.
Historically, the hadal zone was not recognized as distinct from the abyssal zone, although the deepest sections were sometimes called "ultra-abyssal".During the early 1950s, the Danish Galathea II and Soviet Vityaz expeditions separately discovered a distinct shift in the life at depths of 6,000–7,000 m (20,000–23,000 ft) not recognized by the broad definition of the abyssal zone.
Abyssobrotula galatheae is a species of cusk eel in the family Ophidiidae. [1] [3] It is the deepest-living fish known; one specimen, trawled from a depth of 8,370 m (27,460 ft) in the Puerto Rico Trench in 1970, holds the record for the deepest fish ever captured. [4]
The recently described Centropyge abei is known to inhabit depths of 150 m (490 ft). They are diurnal animals, hiding amongst the nooks and crevices of the reef by night. Some species are solitary in nature and form highly territorial mated pairs; others form harems with a single male dominant over several females.
The world's deepest living fish, Abyssobrotula galatheae, a species of cusk eel, lives in the Puerto Rico Trench at a depth of 8,372 meters (27,467 ft). [ 23 ] [ 25 ] Due to the extreme pressure, this appears to be around the theoretical maximum depth possible for fish.
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King mackerel commonly occur in depths of 12–45 m (40–150 ft), where the principal fisheries occur. Larger kings (heavier than 9 kg or 20 lb) often occur inshore, in the mouths of inlets and harbors, and occasionally even at the 180 m (590 ft) depths at the edge of the Gulf Stream .
The fish normally hangs nearly motionless in the water, at a depth of about 600 metres (2,000 ft) to 800 metres (2,600 ft), using its large fins for stability and with its eyes directed upward. In the low light conditions it is assumed the fish detects prey by its silhouette. This is because the eyes have no lens in the diverticulum, so images ...