Baja de Arguineguín

This reef runs close to 700 metres along an old lava flow, and diving it means moving along its length rather than around a compact platform, ducking under overhangs and past big volcanic boulders as you go. Grunts gather under the ledges in numbers, and moray eels use the same shelter, tucked back far enough that a torch beam finds them before your eyes do.

Sandy gaps break up the rock at intervals, and octopus and cuttlefish work these open patches between the boulders. Wrasse and bream move over the rock in loose groups, and yellow snappers and small sardine schools flash through the water column above the reef. Look closer at the rock face and spider crabs sit tucked against the base of boulders, with cleaner shrimp working the same crevices.

Between November and May, this is also where the reef's best-known seasonal encounter happens: angel sharks resting on the sand, spotted often enough in that window to be worth planning around, though never a sure thing on any single dive. When current runs along the reef's axis, some centres turn the dive into a drift rather than a there-and-back swim, covering more of the 700 metres on a single tank.

Of the three south-coast stops, this is the one that asks the least of a diver, and it earns that through shape rather than depth. A lava flow, rather than a volcanic platform or an engineered structure, gives the reef its linear, overhang-heavy layout, and those overhangs are the specific reason centres tell divers to bring a torch here rather than at Pasito Blanco or the Arrecife Artificial.

At 12-16m it sits shallower than both neighbours, with calmer, more forgiving conditions overall. Operators treat it as the warm-up or training leg of a morning out, not the destination dive, and that's not a knock. Plenty of common reef life, from octopus to wrasse to bream, turns up along the route without the current or depth pressure found nearby, and the November-to-May angel shark window gives it a genuine reason to return outside peak summer.

The 700-metre length is also what makes the drift option work. A compact reef doesn't give current anywhere to build momentum along; this one does, and on the right day a single tank covers ground a there-and-back dive on a shorter site never could.

Pleasure boat traffic passes through the area, so treat a surface marker buoy as standard practice rather than optional. The overhangs are where a torch earns its keep on this dive, more than at a shallower, more open reef. Grunt shoals and moray eels sit back from the light, and a beam finds them faster than your eyes will.

For most of its length, this reef never leaves Open Water depths, though the reported range stretches toward 18-20 metres in places. Divers planning for the deeper end benefit from Advanced Open Water, though the reef as typically run doesn't exclude Open Water divers. If angel sharks are the goal, plan the trip for November through May. Outside that window, sightings still happen, but they're not why divers choose this reef.