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Black Rock Sands,
Porthmadog, United Kingdom
No information
20.1°C
Last updated :
10/07/2026 12:00
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United Kingdom
Wales
Porthmadog
Black Rock Sands
Beach
Unnamed beach
Black Rock Sands
Unnamed beach
Unnamed beach
Unnamed beach
Unnamed beach
Unnamed beach
Unnamed beach
Unnamed beach
Unnamed beach
Unnamed beach
Unnamed beach
Unnamed beach
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Jellyfish density evolution
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Black Rock Sands
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Identification
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Pelagia N.
5 - 10 cm
Aurelia A.
25 - 40 cm
Rhizostoma O.
20 - 90 cm
Cyanea L.
15 - 30 cm
Physalia P.
10 - 30 cm
Chrysaora H.
15 - 30 cm
Velella V.
4 - 8 cm
Cyanea C.
30 - 200 cm
Mnemiopsis L.
7 - 12 cm
Description rapide
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Ball / Plate +
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