Photic region
Photic region Photic region (Phytogeography) The uppermost zone of the sea, which receives the most light. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

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  • photic region — noun or photic zone : the uppermost layer of the sea or other body of water receiving sufficient light from the sun to affect living organisms especially by permitting the occurrence of photosynthesis …   Useful english dictionary

  • photic zone — noun see photic region * * * Biol. the upper layer of a body of water delineated by the depth to which enough sunlight can penetrate to permit photosynthesis. [1970 75] …   Useful english dictionary

  • Photic zone — The photic zone or euphotic zone (Greek well lit ) is the depth of the water in a lake or ocean, that is exposed to sufficient sunlight for photosynthesis to occur. The depth of the photic zone can be greatly affected by seasonal turbidity.It… …   Wikipedia

  • photic zone — Biol. the upper layer of a body of water delineated by the depth to which enough sunlight can penetrate to permit photosynthesis. [1970 75] * * * ▪ oceanography       surface layer of the ocean that receives sunlight. The uppermost 80 m (260… …   Universalium

  • Deep sea fish — Humpback anglerfish Deep sea fish is a term for any fish that lives below the photic zone of the ocean. The lanternfish is, by far, the most common deep sea fish. Other deep sea fish include the flashlight fish, cookiecutter shark, bristlemouths …   Wikipedia

  • Portal:Fish — Wikipedia portals: Culture Geography Health History Mathematics Natural sciences People Philosophy Religion Society Technology …   Wikipedia

  • Deep sea communities — giant tubeworm Deep sea communities currently remain largely unexplored, due the technological and logististical challenges and expense involved in visiting these remote biomes. Because of the unique challenges (particularly the high barometric… …   Wikipedia

  • marine ecosystem — Introduction       complex of living organisms in the ocean environment.       Marine waters cover two thirds of the surface of the Earth. In some places the ocean is deeper than Mount Everest is high; for example, the Mariana Trench and the… …   Universalium

  • Fisheries glossary — This is a glossary of terms used in fisheries, fisheries management and fisheries science. A * Abundance is a measure of how many fish are in a population or a fishing ground. See relative abundance and absolute abundance.* Acoustic survey a… …   Wikipedia

  • Ocean — For other uses, see Ocean (disambiguation). Maps exhibiting the world s oceanic waters. A continuou …   Wikipedia

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