Are there jellyfish at Arenal today?

No jellyfish have been reported at Arenal (Castro-Urdiales) today. Last updated: 11/04/2026 17:54.

Is it safe to swim at Arenal today?

Swimming at Arenal appears safe today, no jellyfish reported. Check Meduseo for updates.

No information 15.00°C

Last updated : 11/04/2026 17:54

No recent reports

Beach (if available)

Observation position

Date of observation

How many jellyfish did you see?

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What did they look like?

Other

Pelagia

5 - 10 cm

Aurelia

25 - 40 cm

Rhizostoma

20 - 90 cm

Cotylorhiza

30 - 40 cm

Chrysaora

15 - 30 cm

Velella

4 - 8 cm

Description rapide

Estimated size :

Dominant color :

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