With about 3 hectares, this protected area includes a submerged cave consisting of a lava tube located in a basaltic lava flow associated with the Complexo Vulcânico de Santa Bárbara (volcanic complex). It presents a complex of galleries linked together, with rolled stones bottoms, boulders and sand clearings.

In this area, there are marine flora organisms, such as seaweeds and colonies of Parazoanthus spp.

Regarding marine fauna, stands out the presence of Plesionika narval, Octopus vulgaris and many fish, such as the Anthias anthias, the Phycis phycis, the Sphoeroides marmoratus and the Synodus saurus and the Dasyatis pastinaca.