Moderate
Cyanea lamarckii
Scyphozoa (Cyaneidae)
Little cousin of the famous "lion's mane jellyfish" (Cyanea capillata), it prefers the cold waters of the Atlantic and the English Channel. It is completely absent from the Mediterranean.
Sting symptoms
Painful sting comparable to nettles. Causes temporary redness.
Identification
Translucent blue to purple (sometimes yellowish in juveniles). Its umbrella is slightly lobed (scalloped) and it trails an abundant "mane" of dozens of fine tentacles.
Size
Umbrella: 15 to 30 cm
Habitat
Coastal waters and open sea (cold to temperate waters).
Scientific family
Scyphozoa (Cyaneidae)
Community photos
Photos submitted and verified by Meduseo users. (13)
10/07/2026
Luc-sur-Mer
25/06/2026
Saint-Pol-de-Léon
24/06/2026
Hermanville-sur-Mer
24/06/2026
Colleville-Montgomery
24/06/2026
Ouistreham
24/06/2026
Colleville-Montgomery
23/06/2026
Saint-Pol-de-Léon
20/06/2026
Blonville-sur-Mer
31/05/2026
Siouville-Hague
30/05/2026
Tourgéville
28/05/2026
Sarzeau
25/05/2026
Benerville-sur-Mer
23/05/2026
Bray-Dunes