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Mesopelagic zone

mesopelagic zone
A layer of the oceanic zone lying beneath the epipelagic zone and above the bathypelagic zone, at depths generally between 200 and 1,000 m (656 and 3,280 ft). The mesopelagic zone receives very little sunlight and is home to many bioluminescent organisms. Because food is scarce in this region, most mesopelagic organisms migrate to the surface to feed at night or live off the falling detritus from the epipelagic ecosystem.


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    mesophil mes·o·phil (měz’ə-fĭl’) or mes·o·phile (-fīl’) n. A microorganism with an optimum growth temperature that is between 20°C and 45°C. mes’o·phil’ic (-fĭl’ĭk) adj.

  • Mesophile

    [mez-uh-fahyl, -fil, mes-, mee-zuh-, -suh-] /ˈmɛz əˌfaɪl, -fɪl, ˈmɛs-, ˈmi zə-, -sə-/ Bacteriology adjective 1. . noun 2. a bacterium.

  • Mesophilic

    [mez-uh-fil-ik, mes-, mee-zuh-, -suh-] /ˌmɛz əˈfɪl ɪk, ˌmɛs-, ˌmi zə-, -sə-/ adjective 1. (of bacteria) growing best at moderate temperatures, between 25°C and 40°C. /ˌmɛsəʊˈfɪlɪk/ adjective 1. (biology) (esp of bacteria) having an ideal growth temperature of 20–45°C

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