Jordi Chias / Jellyfish (Diplulmaris antarctica). Cuverville, Antarctic Peninsula, Antarctica.

SCOTLAND: The Big Picture / Jellyfish (Pelagia noctiluca) amongst plankton , Shetland Isles, Scotland.

Alex Mustard / Lion's mane jellyfish (Cyanea capillata) with feeding tentacles spread swimming in the sun in shallow water. Gulen, Norway. North East Atlantic Ocean.

Luis Quinta / Moon jellyfish (Aurelia aurita) near the surface, Santa Maria Island, Azores, September.

Aflo / Northern sea nettle (Chrysaora Melanaster) floating, with Mackerel fry ( Carangidae) Izu, Japan. January.

Pascal Kobeh / Multitudes of Moon jellyfish (Aurelia labiata), Alaska, USA, Gulf of Alaska. Pacific ocean.

Alex Mustard / Aggregation of moon jellyfish (Aurelia aurita) with sunbeams, below the surface of the ocean. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Alex Mustard / Moon jelly (Aurelia aurita) drifts over a coral reef. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Nick Hawkins / Lions mane jellyfish (Cyanea capillata) drifts in the current near Port Joli, Nova Scotia, Canada. June

Nick Hawkins / Lions mane jellyfish (Cyanea capillata) drifts over intertidal seaweeds off Nova Scotia, Canada. July

Nick Hawkins / Lions mane jellyfish (Cyanea capillata) drifts in the current off Nova Scotia, Canada. July

Nick Hawkins / Lions mane jellyfish (Cyanea capillata) drifts in the current near Port Joli, Nova Scotia, Canada. July