Jellyfish

Beautiful but keep your distance — many species trail stinging tentacles well beyond what you can see. Moon jellies are harmless and ethereal; box jellies and Portuguese man-o-war demand serious respect. Check conditions before your dive.

Last updated April 2026

Species

Moon jellyfish

Aurelia aurita(12 photos)

Up to 40 cm0–10mOpen water

A translucent, saucer-shaped jellyfish with four horseshoe-shaped purple-blue gonads visible through the bell. Simple, elegant, and instantly recognizable.

Drifts near the surface in calm conditions, sometimes in large blooms — mild sting, generally harmless to divers but can irritate sensitive skin.

Observed at

Rosalie Moller(Hurghada)

Fried egg jellyfish

Cotylorhiza tuberculata(1 photos)

Up to 35 cm0–10mOpen water

Unmistakable — a white bell with a raised central dome and blue-purple frilly oral arms tipped with bright orange. Looks exactly like a fried egg floating in water.

Common in late summer Mediterranean — drifts at the surface, essentially harmless to humans with a very mild sting.

Observed at

Roca Muladera(Tossa de Mar)

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