Mérou Valley
Corsica · France
A submerged granite canyon off southern Corsica's Bonifacio coast, Mérou Valley (Vallée des Mérous) is named for the extraordinary aggregations of dusky grouper that haunt its boulder-strewn floor. Enormous individuals over a metre long rest in plain sight among kelp-draped boulders, utterly unperturbed by divers. This is arguably the finest grouper dive in the entire Mediterranean, with up to a dozen large adults visible in a single pass.
Conditions
Depth
10 to 35 m
Advanced depths
Current
Usually still
Can pick up on the edge
Visibility
15 to 30 m
Clearest in the calm season
Water
13 to 28°C
3mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 13 | 13 | 13 | 14 | 17 | 21 | 24 | 25 | 23 | 20 | 17 | 14 |
| Vis (m) | 15 | 15 | 20 | 20 | 20 | 20 | 15 | 15 | 20 | 20 | 20 | 15 |
| Current | Gentle | Gentle | Gentle | Gentle | Still | Still | Still | Still | Gentle | Gentle | Gentle | Gentle |
Your chances of seeing each animal
Tyrrhenian Wall Lizard
Last confirmed Jul 6, 2026 · 95 records
Almost always
Nearly every dive
Italian Wall Lizard
Last confirmed Jul 8, 2026 · 44 records
Almost always
Nearly every dive
Dusky Grouper
Last confirmed Jul 4, 2026 · 21 records
Very likely
Most dives
Bedriaga'S Rock Lizard
Last confirmed May 29, 2026 · 25 records
Likely
About 6 in 10 dives
Scorpionfish
Last confirmed Jun 13, 2026 · 2 records
Likely
About 6 in 10 dives
Dentex
Last confirmed Jun 28, 2026 · 4 records
Sometimes
About 1 in 3 dives
Gear