Jordi Chias / Atolla jellyfish (Atolla wyvillei) with Gentoo penguin (Pygoscelis papua) in the background near the surface. Antarctic Peninsula. Finalist in the Underwater category of the Wildlife Photographer of t...

David Shale / Medusa caught with 1m ring net between 0 and 150m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea Medusa jellyfish (Colobonema sp), Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Tentacles of deepsea medusa jellyfish (Atolla manubrium) Gulf of Maine, Atlantic

David Shale / Deepsea Anthomedusa {Pandea rubra} Gulf of Maine, Atlantic

David Shale / (Periphylla sp) jellyfish, deep sea Atlantic ocean

David Shale / (Octophialucium funerarium) hydromedusan jellyfish, deep sea Atlantic ocean

David Shale / (Chromatonema rubrum) a hydromedusan jellyfish, deep sea Atlantic ocean

David Shale / (Atolla sp) a deep sea medusa, deep sea Atlantic ocean

Sue Daly / Deep sea jellyfish (Periphylla periphylla), Trondheimsfjord, Norway, July.

Sue Daly / Deep sea jellyfish (Periphylla periphylla), Trondheimsfjord, Norway, July.

David Shale / Jellyfish (Pelagia) swimming, Mid-Atlantic Ridge. Deep sea species.