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Jellies have also adapted their body color to camouflage in the darkness. Most are nearly colorless and transparent, so they can be difficult for predators to see. However, some deep sea jellyfish and comb jellies are a bright red or orange color. Why would they be red instead of black to blend in with the dark water? Red cannot be seen in dark water (deeper than 200 meters), so there's no greater protection from black than red. But red is preferred to black because pigment is easier for animals to produce. Some deep sea jellies just have dark red guts, possibly serving to mask luminescent prey from other larger predators with eyes
stonecrushing production linefor sale godsend mining Combination Crusher The compound crusher is used to crush a variety of medium hard ores, such as limestone, clinker,coal and other ores, which can be widely used in mining, metallurgy, refractory, cement, coal,glass, ceramics, electric power and other industries, and is one of the commonly used equipment in the crushing production line
mechanical crusher different; mechanical crusher different. Apr 03, 2015Crushersare classified into threetypesbased upon the stage ofcrushingthey accomplish. These are (i) primarycrusher, (ii)secondary crusher, and (iii)tertiary crusher. The primarycrusherreceives material directly from run of mine (ROM) after blasting and produces the first
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