Skip to content
Species
First Aid
Explore
Information
🇬🇧
🇫🇷 FR
🇬🇧 EN
🇪🇸 ES
🇮🇹 IT
🇳🇱 NL
Login
View all alerts
Plage du Treno,
Arzon, France
No information
19.3°C
Last updated :
02/10/2026 06:00
Contribute
Worldwide
France
Brittany
Arzon
Plage du Treno
Beach
Plage du Kerver
Plage du Fogeo-Kerjouanno
Plage de Port-Sable
Plage de Port-Blanc
Plage de Port Lenn
Unnamed beach
Unnamed beach
Unnamed beach
Unnamed beach
Plage des Fontaines
Plage du Treno
Unnamed beach
Unnamed beach
Unnamed beach
Bechir
Latest reports
No recent reports
Jellyfish density evolution
7 days
30 days
Report detail
Date
Beach
Comments
GPS
Jellyfish size
Jellyfish color
Water temperature
Certified account
Certified contributor
Photo
Report jellyfish
Beach (if available)
By beach
My position
Point on the map
-- Beach (if available) --
Plage du Kerver
Plage du Fogeo-Kerjouanno
Plage de Port-Sable
Plage de Port-Blanc
Plage de Port Lenn
Unnamed beach
Unnamed beach
Unnamed beach
Unnamed beach
Plage des Fontaines
Plage du Treno
Unnamed beach
Unnamed beach
Unnamed beach
Bechir
My position
Observation position
Date of observation
How many jellyfish did you see?
none
very little
few
a lot
Water temperature
Optional
Optional. Enter a value between 8.0 and 30.0°C with at most one decimal.
Identification
Optional
Help us keep reliable data! If you're not sure about the species, just indicate the size, the color or add a photo.
What did they look like?
Other
Pelagia N.
5 - 10 cm
Aurelia A.
25 - 40 cm
Rhizostoma O.
20 - 90 cm
Physalia P.
10 - 30 cm
Chrysaora H.
15 - 30 cm
Velella V.
4 - 8 cm
Description rapide
Estimated size :
Coin
Hand
Ball / Plate +
Dominant color :
Clear
Pink / Violet
Brown / Yellow
Blue
Take a photo
Choose from gallery
The ultimate proof for identification
By submitting a photo, you agree to our
terms of use
.
Comments
Optional
Create your free account
Track your reports, add favorites and access exclusive features.
Ad-free
100% free
Create my account
Learn more
Close
Photo approved