Science / Marine Biology / Mesopelagic Zone: Also called the 'twilight zone' of the ocean, this area from 200m to 1000m in depth, is bordered by the photic zone above and darkness below. It's in this zone where you start to see bioluminescence on all sorts of animals. Visit the Mesopelagic Zone on oceanlink to learn about the animals unique to these depths.
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Zone Noun Synonyms: area, quarter, district, region, sector, section, sphere, belt, territory, province, realm, domain, precinct, bailiwick, department, terrain, circle, locality, locale, turf
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Technology / Aviation / Twilight Zone: Long before Rod Serling's tv series was this consumer-lever definition for a glitch in the ADCOCK RANGE, officially called a Bi-Signal Zone. It was a portion of the overlapping area of a beam where th MORE
Science / Geology / Surf Zone: An area of breaking waves bounded by the point of first breakers, then landward to the maximum uprush of waves on the beach. MORE
Science / Marine Biology / Sunlight Zone: See Photic Zone. MORE