Los Arcos, Lanzarote: volcanic arches and swim-throughs

Los Arcos presents a distinct geological profile compared to the standard drop-offs often found in the region. The site is defined by a rugged volcanic reef structure that features a variety of arches and narrow swim-throughs. This topography creates a complex environment where water movement and light play against the dark volcanic rock. You will find that the layout offers multiple paths for exploration, moving from shallower zones to deeper sections.

The dive profile begins in a shallow area, where the depth starts at approximately 3 metres. As you move away from the shore toward the main reef, the topography drops steadily toward a maximum depth of 27 metres. This depth range allows for a diverse experience, from casual reef exploration to deeper, more technical navigation. Navigating through the various cracks and openings in the rock requires careful attention to buoyancy and orientation.

Navigating the underwater topography is the primary draw of this location. The volcanic rock has eroded over time to create natural arches that serve as gateways between different sections of the reef. These swim-throughs provide shelter for various species and offer a different perspective on the reef structure. Choosing to dive through an arch can change the light and current conditions you experience instantly.

The marine life at Los Arcos is closely tied to the structure of the volcanic reef. In the crevices and under the rocky overhangs, you can frequently observe common octopus (Octopus vulgaris) and moray eels. These species utilize the natural holes and passages for protection. The complex terrain provides an ideal habitat for them to hide and hunt within the reef system.

As you move along the reef, keep an eye out for larger residents like the common stingray (Dasyatis pastinaca). These rays often glide near the sandy patches that alternate with the rocky reef sections. You might also encounter the Canarian lobster (Palinurus eleides) seeking shelter within the deeper crevices. The variety of habitats, from sandy bottoms to steep rocky walls, supports a diverse resident population.

Water visibility at Los Arcos typically ranges between 10 and 30 metres. While the visibility is often high, it can be affected by surface conditions. If the sea is rough, the proximity to the shore can lead to increased sediment, which might temporarily reduce clarity. When conditions are calm, the clarity is sufficient to see the detailed textures of the volcanic rock and the life clinging to them.

Currents at this site are generally light to moderate. However, the local conditions can shift depending on the state of the sea and the specific area you are exploring. Near the shore, the water is often calm, but the current can pick up as you move further out toward the deeper parts of the reef. It is important to monitor your gas consumption and heading when moving through the arches where flow can become more noticeable.