El Bajon, El Hierro: Deep volcanic pinnacle in the marine reserve

El Bajon is a submerged volcanic mountain located off the south coast of El Hierro, within the La Restinga–Mar de las Calmas Marine Reserve. Unlike a broad reef system, this site is a distinct pinnacle that rises abruptly from the deep ocean. It is characterized by a highly vertical profile that creates a sense of massive scale as you descend along its slopes. Access to the site is strictly by boat, as the topography is too deep and complex for shore entries.

The dive profile begins at the upper summits, which sit at approximately 6 metres and 9 metres. At these shallow depths, the topography includes a notable crater-like depression that forms a natural amphitheater. From these summits, the terrain transitions into steep walls and slopes that drop away rapidly. The descent quickly moves from the shallow plateau into much deeper waters, reaching a maximum depth of 50 metres. This dramatic change in depth is what defines the vertical character of the site.

Current is a defining and consistent feature of El Bajon. You can expect strong water movement that is influenced by the tidal phase and local weather conditions. Because of this, the site is not suitable for drift diving, as the current can be unpredictable and forceful. Managing your buoyancy and maintaining position against the flow is a primary requirement for a successful dive here. Staying mindful of the current is essential for navigating the vertical transitions safely.

The visibility at El Bajon is typically between 15 and 30 metres, providing a clear view of the vast oceanic drop-offs. This clarity allows for excellent observation of both the resident reef life and the pelagic species passing through the area. The light penetrates well down the walls, highlighting the textures of the volcanic rock. The combination of clear water and steep relief makes the site highly effective for observing the scale of the marine environment.

Resident marine life is abundant along the rocky slopes and within the crevices of the volcanic structure. You will frequently encounter various species of groupers and moray eels hiding within the substrate. Large numbers of damselfish and salema porgy are common throughout the shallower sections. Parrotfish and barracuda also move through the water column, adding to the activity around the vertical walls. The site's structure provides numerous hiding spots for these species.

The site's location within a marine reserve ensures a healthy ecosystem, making it a significant location for observing larger predators. You may see Atlantic stingrays cruising the sandy patches or near the base of the slopes. The presence of amberjacks and large barracuda is a common occurrence in these waters. The interaction between the current and the pinnacle's topography helps attract these mobile species to the site.

El Bajon is widely recognized as one of the most significant dive sites on El Hierro. Its reputation is built on the combination of its unique volcanic morphology and the high level of biodiversity. The site offers a distinct experience compared to flatter reef structures due to the steepness of the walls and the depth of the surrounding water. It remains a primary destination for divers looking to experience the true volcanic nature of the island's coastline.