The greatest threat against the moon jellyfish in its medusa stage is the lion´s mane jellyfish - detected often when the moon jellyfish feels the stinging tentacles against the outer parts of its "umbrella". In the middle of its "umbrella" where there are no nerves, it seems as though the moon jellyfish does not have any feelings. When the moon jellyfish detects a lion´s mane jellyfish, it usually will swim upwards.
    Moon jellyfish are global and are common along most coasts.

Bo Johannesson

This 1,5 cm long copepod finds it congenial on and in the jellyfish because it can both eat the medusae and its food. Moreover they get transported around on the medusae and recieve protection from their enemies.

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Medusae and polyps

Many jellyfish

Catch food with the whole of their body

Jelly eaters

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Bo Johannesson | Martin Larsvik | Lars-Ove Loo | Helena Samuelsson