The shoal is a part of a long series of granite reliefs continuing towards the south-west with Secca di Mezzo and Secca di Libeccio. The bottom reaches the 30m, while the rocks reach the 24-26m. From the detrital bottom, scattered boulders at first and then more compact formations form several reliefs characterized by fissures, tafoni, erosion shapes, and passages among piled-up blocks, giving the opportunity to carry out several routes.
The feature characterizing the environment of the shoal is the current which, meeting the relief on the flat bottom, accelerates, sneaks in the fissures and the depressions among the boulders, creating a particularly suitable environment for gorgonians. On the detrital bottom, large fans of white Eunicella alternate a candlestick shape with more complex shapes, while on the boulders yellow Eunicella and gorgonians are so thick that sometimes they block the channels. All the shady areas are covered with non-stop carpets of yellow cluster anemones alternating with the tube-shaped protuberance of the sponge Haliclona mediterranea.
All around it is possible to meet bluestreak cleaner wrasses, brown groupers, white seabreams, dentexes, and greater amberjacks in a very illuminated environment despite the depth.