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This jellyfish fossil is from the Cambrian period, more than 500 million years ago.
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Fossil Jellyfish

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Two of the worlds largest jellyfish, the lions mane jellyfish, float together.
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Extreme Jellyfish

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Photograph of a red "jellyfish" with many fine tentacles surrounding the bell and floating against a black background.
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Red Jellyfish

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A fringe of tentacles surrounds the bell of this jellyfish (Halicreas minimum).
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Midwater Jellyfish

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A deep red jellyfish, Crossota norvegica, floats in the water.
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Deep-Red Jellyfish

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A screenshot from the video "A Jellyfish is Born" showing a jellyfish polyp.
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A Jellyfish Is Born

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a orange spotted jellyfish
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Orange Spotted Jellyfish

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Overfishing is leading to an abundance of less desirable species like jellyfish.
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Peanut Butter and Jellyfish

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Venomous Box Jelly from South Carolina
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Pinning Down the Jellyfish

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Throughout their lifecycle, jellyfish take on two different body forms: medusa and polyps. Polyps can reproduce asexually by budding, while medusae spawn eggs and sperm to reproduce sexually.
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Jellyfish Lifecycle and Reproduction

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Chrysaora melanaster is a jellyfish found in the Arctic.
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Jellyfish and Comb Jellies

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This rare staurozoan, or stalked jellyfish, Haliclystus californiensis, is about 2 centimeters in length and was collected off the coast of California.
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Staurozoan: The Stalked Jellyfish

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