Secallins

Rocky formations rise five to seven metres above the surface between Sant Feliu and Sant Pol, their underwater flanks dropping to beyond 20 metres. Between and around them, Posidonia oceanica meadows extend in every direction — long green fronds moving with the surge, sheltering a community distinct from the open rock faces. Cow bream school around the formation edges. The shallow tops at 5-10 metres receive the best light for photography, while the deeper margins between rock and seagrass hold the more secretive residents. The gentle profile means 60-minute dives are routine, and the entire depth range stays comfortable without gas pressure.

Secallins is the Posidonia dive in Sant Feliu — the site where the seagrass meadows are the experience rather than a background feature. These endemic Mediterranean plants are legally protected and serve as a bioindicator of coastal water quality; their density here speaks well of the local marine environment. The seagrass also makes this one of the few Sant Feliu sites where long-snouted seahorses have been photographed — invisible among the fronds to divers who do not know where to look. For anyone drawn to Mediterranean marine ecology rather than dramatic walls or tunnels, this is the site to request. The formations break the surface, which also makes Secallins one of the rare sites in the area that works for snorkeling.

Bring a macro lens or close-up diopter — the Posidonia fronds conceal seahorses, pipefish, and nudibranchs that wide-angle misses entirely. Buoyancy discipline is critical here: dragging fins through the seagrass damages a protected habitat and stirs sediment that kills visibility for everyone behind you. The shallow profile means long bottom times, so plan gas around duration rather than depth. Morning dives typically have calmer surface conditions before the afternoon thermal breeze builds. Neighbouring Les Balelles offers a complementary multilevel dive on the same boat outing without repositioning.