A red medusa jellyfish of the genus Atolla is seen swimming in this handout photograph from WHOI's expedition to the Celebes Sea in October 2007.

The deep-sea jellyfish is among a handful of creatures—some of which might be new species—recently caught by the Filipino-U.S. team in the waters south of the Philippines' Sulu Archipelago.

The animal's deep red hue is actually common among these jellyfish, according to the Woods Hole team. Although it is not visible in the ocean's dark depths, the color masks any bioluminescence given off by prey trapped inside the jellies' guts.

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