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Deep SeaApex

Giant Phantom Jelly

Stygiomedusa gigantea

Four ghostly ribbons trail through the abyss.

The giant phantom jelly drifts like a crimson umbrella with four enormous ribbons flowing behind. Scientists rarely meet this mysterious giant, even after thousands of deep-sea dives.

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SeaRealm card featuring Giant Phantom Jelly

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Creature passport

Home
It appears in deep oceans worldwide except the Arctic, usually in the midnight zone.
Favorite foods
Scientists think it catches plankton and small fishes with its ribbon-like mouth arms.
Size check
Bell over 3.3 ft (1 m); arms longer than 33 ft (10 m)

Tell-your-friends facts

Four wonderfully wild things

  1. 1

    Unlike many jellies, it has no stinging tentacles around the bell.

  2. 2

    Its deep crimson color looks almost black where sunlight never reaches.

  3. 3

    MBARI has encountered only a handful during thousands of dives.

  4. 4

    A small brotula fish has been seen hiding safely beside its giant bell.

Ocean superpower

Built to be amazing

Four curtain-like oral arms sweep a huge area without stinging tentacles.

Junior scientist tip

What should I look for?

Find the broad dark-red bell and exactly four long flat trailing arms.

Grown-up research links

We used trusted science organizations to check this profile.