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Encyclopedia > Bathyal zone
The layers of the pelagic zone.
The layers of the pelagic zone.

The bathyal zone or bathypelagic is the pelagic zone that extends from a depth of 1000 to 4000 meters below the ocean surface. It lies between the mesopelagic above, and the abyssopelagic below. The average temperature hovers at about 4 degrees Celsius, or 39 degrees Fahrenheit. Although larger by volume than the Euphotic zone, the bathyal zone is less densely populated. Sunlight does not reach this zone, meaning there can be no primary production. It is known as the midnight zone because of this feature. Because of the lack of light, some species do not have eyes, but one of the species that does is the viperfish. Many forms of nekton live in the bathyal zone, such as squid, large whales, and octopus, but this zone is difficult for fish to live in. Sponges, brachiopods, sea stars, and echinoids are also common in the bathyal zone. The fish in this zone have become very energy efficient since it is especially hard to find nutrients. Many have slow metabolic rates, to conserve energy. The fish here have weak muscles, soft skin and slimy bodys. Animals in the bathyal zone aren't threatened by predators that can see them, so they do not have powerful muscles. There are few plants because of lack of sun, photosynthesis. Image File history File links Download high resolution version (576x1686, 178 KB) The different parts of the Pelagic zone. ... Image File history File links Download high resolution version (576x1686, 178 KB) The different parts of the Pelagic zone. ... This is a scale diagram of the layers of the pelagic zone. ... Animated map exhibiting the worlds oceanic waters. ... The pelagic zone is the part of the open sea or ocean comprising the water column, i. ... The pelagic zone is the part of the open sea or ocean comprising the water column, i. ... The euphotic zone is the surface layer of the ocean where sufficient light is available for photosynthesis. ... To meet Wikipedias quality standards and make it easier to understand, this article or section may require cleanup. ... Species See text. ... Nekton is the grouping of living organisms that live in the water column of the ocean and freshwater lakes. ... Suborders Myopsina Oegopsina Squid are a large, diverse group of marine cephalopods. ... A Fin Whale The term whale is ambiguous: it can refer to all cetaceans, to just the larger ones, or only to members of particular families within the order Cetacea. ... Suborders †Pohlsepia (incertae sedis) †Proteroctopus (incertae sedis) †Palaeoctopus (incertae sedis) Cirrina Incirrina Synonyms Octopoida Leach, 1817 The octopus (Greek , eight-legs) is a cephalopod of the order Octopoda that inhabits many diverse regions of the ocean, especially coral reefs. ... A juvenile Red-tailed Hawk eating a California Vole In ecology, predation describes a biological interaction where a predator species kills and eats other organisms, known as prey. ...


  Results from FactBites:
 
abyssal zone --¬† Encyclop√¶dia Britannica (831 words)
The zone is defined mainly by its extremely uniform environmental conditions, as reflected in the distinct life forms inhabiting it.
The upper boundary between the abyssal zone and the overlying bathyal zone is conveniently defined as the depth at which the water temperature is 4° C (39° F); this…
The upper boundary between the abyssal zone and the overlying bathyal zone is conveniently defined as the depth at which the water...
photic zone - Ask.com Search (205 words)
In the ocean (or in lakes) this is the area near the surface with enough light to support photosynthesis.
Photic Zone - In the ocean (or in lakes) this is the area near the surface with enough light to support photosynthesis.
The photic zone is the depth of the water, whether in a lake or an ocean, that is exposed to sufficient sunlight for photosynthesis to occur.
  More results at FactBites »

 
 

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