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Deep sea

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<nowiki>mar profundo; 深海; Абиссаль; бездна; Tiefsee; Deti i thellë; ژرف; 深海; Dybhav; 深海; djuphav; עומק פני הים; 심해; profunda maro; Длабоко море; abysse; глыбокае мора; Regiões abissais; diepsee; Vandenyno gelmės; globoko morje; syvämeri; Deepsee; Laut dalam; Laut dalam; Chhim-hái; dyphav; diepzee; Mar profund; ทะเลลึก; Süvameri; Abís; deep sea; عمق البحر; Βαθιά θάλασσα; ਡੂੰਘੇ ਸਮੁੰਦਰ; capa más profunda de los océanos; おおよそ水深200m以上の海域; zone océanique profonde; θαλάσσιο περιβάλλο που βρίσκεται κάτω από το επίπεδο στο οποίο εισχωρεί το φως; 最深的海洋層; zona più profonda degli oceani; lichtlose Bereiche des Meeres; ਸਮੁੰਦਰ ਦਾ ਇੱਕ ਖੇਤਰ ਜਿਸਦੀ ਡੂੰਘਾਈ ਏਕਮੈਨ ਪਰਤ ਦੀ ਡੂੰਘਾਈ ਤੋਂ ਦੁੱਗਣੀ ਹੈ; area of sea with a depth greater than twice the depth of Ekman layer; la plej profunda tavolo de oceanoj; seegebied met 'n diepte groter as twee keer die diepte van die Ekman-laag; območje morja z globino, ki je večja od dvojne globine trenja; Oceà profund; Tiefseeforschung; grands-fonds; milieu marin profond; océan profond; grand fond; grandes profondeurs; grands fonds marins; grands fonds; 심해 생물; Abyssal; Djuphavsbotten; deep layer; globoka plast; глубокое море; глубоководность</nowiki>
deep sea 
area of sea with a depth greater than twice the depth of Ekman layer
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Wikidata Q1070117
GND ID: 4185436-6
Library of Congress authority ID: sh85000286
J9U entity ID: 987007292825205171
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fauna

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Main gallery: Deep-sea fish.

Mesopelagic fish

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Mesopelagic fish
Most mesopelagic fishes are small filter feeders which ascend at night to feed in the nutrient rich waters of the epipelagic zone. During the day, they return to the dark, cold, oxygen deficient waters of the mesopelagic where they are relatively safe from predators. Lanternfish account for as much as 65% of all deep-sea fish biomass and are largely responsible for the deep scattering layer of the world's oceans.
Most of the rest of the mesopelagic fishes are ambush predators, like this sabertooth fish which uses its telescopic, upward-pointing eyes to pick out prey silhouetted against the gloom above. Their recurved teeth prevent a captured fish from backing out.
The Antarctic toothfish have large, upward looking eyes, adapted to detecting the silhouettes of prey fish[1]
The barreleye has barrel-shaped, tubular eyes which are generally directed upwards but can be swivelled forward[2]
The telescopefish has large, forward-pointing telescoping eyes with large lenses[3]

Bathypelagic fish

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Bathypelagic fish
The humpback anglerfish is a bathypelagic ambush predator, which attracts prey with a bioluminescent lure. It can ingest prey larger than itself, which it swallows with an inrush of water when it opens its mouth.[4]
Many bristlemouth species, such as the "spark anglemouth" above,[5] are also bathypelagic ambush predators which can swallow prey larger than themselves. They are among the most abundant of all vertebrate families.[5]
Young, red flabby whalefish make nightly vertical migrations into the lower mesopelagic zone to feed on copepods. When males make the transition to adults, they develop a massive liver, and then their jaws fuse shut. They no longer eat, but continue to metabolise the energy stored in their liver.[6][7]
The Sloane's viperfish can make nightly migrations from bathypelagic depths to near surface waters.[8]
The widespread fangtooth has the largest teeth of any fish, proportionate to body size.[9] Despite their ferocious appearance, bathypelagic fish are usually weakly muscled and too small to represent any threat to humans.
  1. This is a drawing by former FishBase staff member Robbie N. Cada.
    Drawings done by Robbie Cada are public domain and can be used freely, however, FishBase would appreciate a proper indication of the source.
    Public domain This work has been released into the public domain by its author, Robbie Cada. This applies worldwide.
    In some countries this may not be legally possible; if so:
    Robbie Cada grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

  2. Mystery Of Deep-sea Fish With Tubular Eyes And Transparent Head Solved ScienceDaily, 24 February 2009.
  3. This is a drawing by former FishBase staff member Robbie N. Cada.
    Drawings done by Robbie Cada are public domain and can be used freely, however, FishBase would appreciate a proper indication of the source.
    Public domain This work has been released into the public domain by its author, Robbie Cada. This applies worldwide.
    In some countries this may not be legally possible; if so:
    Robbie Cada grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

  4. Cite error: Invalid <ref> tag; no text was provided for refs named TeAraBZ
  5. a b FishBase link: family {{{2}}} (mirror1, mirror2) +species list (mirror1, mirror2Incorrect non numerical id  
  6. Connecting knowledge and people for more than 10 years. Archived from the original on 2012-07-09.
  7. Scientists solve mystery: 3 fish are all the same (January 22, 2009). Retrieved on 2009-01-22.
  8. This is a drawing by former FishBase staff member Robbie N. Cada.
    Drawings done by Robbie Cada are public domain and can be used freely, however, FishBase would appreciate a proper indication of the source.
    Public domain This work has been released into the public domain by its author, Robbie Cada. This applies worldwide.
    In some countries this may not be legally possible; if so:
    Robbie Cada grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

  9. This is a drawing by former FishBase staff member Robbie N. Cada.
    Drawings done by Robbie Cada are public domain and can be used freely, however, FishBase would appreciate a proper indication of the source.
    Public domain This work has been released into the public domain by its author, Robbie Cada. This applies worldwide.
    In some countries this may not be legally possible; if so:
    Robbie Cada grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

 See also category: oceans.