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

Graham Eaton / Compass Jellyfish, in murky water, Abersoch, Cardigan Bay, Wales, July

Alex Mustard / 2020VISION / Compass jellyfish (Chrysaora hysoscella) swimming over a rocky reef, Plymouth, Devon, UK, August. Did you know? Compass jellyfish change gender throughout their lives, starting off male, and later bec...

Suzi Eszterhas / Sea Nettle (Chrysaora quinquecirrha / achlyos) Monterey Bay Aquarium, California, USA, Captive

Suzi Eszterhas / Two Purple / Striped Jellyfish (Pelegia / Chrysaora colorata) Monterey Bay Aquarium, California, USA, Captive

Neil Lucas / Sea nettles (Chrysaora quinquecirrha) in aquarium, with crowd of people watching, Atlanta, USA, October 2009

Richard Herrmann / Black Sea Nettle (Chrysaora achlyos), Coronado Islands, Baja California, Mexico

Richard Herrmann / Pacific Sea Nettle (Chrysaora fuscescens) group, Carmel, Monterey Bay, California

Ralph Pace / Pacific Sea Nettle (Chrysaora fuscescens) jellyfish, Monterey Bay, California

Ralph Pace / Pacific Sea Nettle (Chrysaora fuscescens) jellyfish in kelp, Monterey Bay, California

Ralph Pace / Pacific Sea Nettle (Chrysaora fuscescens) jellyfish, Monterey Bay, California

Ralph Pace / Sea Nettle (Chrysaora quinquecirrha) jellyfish, Saba Bank, Caribbean