Never-before-seen glowing jellyfish in Mariana Trench ocean depths

Marine biologists with a National Oceanic and Atmospheric Administration expedition in the Mariana Trench encountered a luminous red-and-yellow jellyfish in April, Scientific American reports.

It is believed to be the first time a human has ever seen this species.

This stunningly beautiful jellyfish was seen during Dive 4 of the 2016 Deepwater Exploration of the Marianas expedition while exploring the informally named "Enigma Seamount" at a depth of ~3,700 meters.

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Aequorea victoria, also sometimes called the crystal jelly, is a bioluminescent hydrozoan jellyfish, or hydromedusa, that is found off the west coast of North America.

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By Sierra Blakely

Aequorea victoria

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Sierra Blakely

Aequorea victoria ventral view with parasitic hyperiid amphipod.

. Larger specimens are frequently found with symbiotic hyperiid amphipods attached to the subumbrella, or even occasionally living inside the gut or radial canals.

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Deepwater Exploration of the Marianas