Monterey Bay Aquarium Research Institute
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Atolla jelly

MBARI researchers photographed this scyphomedusa or crown jelly offshore of Monterey Bay at about 965 meters (almost 3,200 feet) below the sea surface. At this depth, the seawater is about four degrees Centigrade (39 degrees Fahrenheit) and contains very little oxygen. It is thought that the reddish color of many deep-sea jellies helps to hide the glow of any bioluminescent prey that may be inside their stomachs.

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