Western Brittany (Brest, Crozon and the Iroise Sea)
Kelp drop-off south of Aber Ildut
Kelp drop-off south of Aber Ildut
Basse Grilhed is a rocky Iroise drop-off south of Aber Ildut where the reef eases from a shallower edge into a deeper kelp-covered plateau. Faults and rock ledges are coated in dense growth and shelter lobsters and octopus, making this a rewarding advanced scuba dive for divers who are comfortable with depth, buoyancy, and open-water rock terrain.
Safety Notes
Plan gas and depth limits for a dive that can reach around 40 m, and use care around rocky faults and crevices.
Access Restrictions
Best for experienced scuba divers; the depth and rock relief call for disciplined buoyancy.
Legal Notes
Follow local marine-park and operator guidance, and avoid disturbing the rocky habitat and sheltering life.
Community notes to help plan your visit.
Scuba Diving
Experienced scuba divers can work the rocky relief and kelp plateau with slow, controlled exploration.
Freediving
Not a freedive site.
Snorkeling
Not a snorkel site.
Conservative baseline from public research. No community dives logged yet.
Last Updated
Research Sources
Official Iroise page on kelp habitat and marine life.
Official tourism listing with seasonal opening window.
Lanildut-based dive center serving Iroise sites by boat.
Directory listing for the Maritime Zone site.
Tombant an Eor is a rocky drop-off dive near Aber Ildut in Brittany.
Basse Breton is a rocky Porspoder site with peaks and wall breaks.