Description of the site of natural interest
Oval-shaped rocky ridge that extends southwards, with a perimeter of about 8km, located at a distance from the coast between 500m – 2.5km, at a depth between 24 and 45m, the Shoals of Santo Stefano are one of the most interesting areas of the extreme west of Liguria.
The submerged peninsular structure starts from a depth of about -15 meters at a distance of a few tens of meters from the tourist port Marina degli Aregai (locality Santo Stefano al Mare) and goes towards the open sea up to a depth of -45m. The main Ligurian coastal current, which moves large masses of water in an East-West direction, impacts the shoal perpendicularly, influencing the structuring of the different benthic communities.
In fact, at least three different environments can be distinguished: 1) the most superficial one, the plateau or saddle of the shoal, with an algal dominance and a dense Posidonia oceanica meadows; 2) the west side hit by a strong dominant current and characterized by important populations of Paramuricea clavata which, together with various species of sponges, shape a habitat rich in ravines and cavities and give shelter to madrepores (Leptopsammia pruvoti) and differently branched bryozoans (Pentapora fascialis and Smittina cervicornis); 3) the east side, rich in suspended material and characterized by the presence of filtering animals that mostly populate the ravines of the rock and the vaults of small caves, thus sheltering from the risk of silting up.
Description of the site of cultural interest
The wreck of a Roman ship carrying amphorae, presumably dating from the period between the 1st century BC. and the 1st century AD, it lies about sixty meters off the port of Aregai, in the southernmost area of the Shoals of Santo Stefano al mare. The ship, about 30m long and 10m wide, was most likely carrying amphorae of the “Dressel 1A” type, 110 centimeters high, used between the 1st century BC. and the 1st century AD, for the transport of wine, and it is estimated that the ship carried about 3,500. The wreck which is located at a depth of about 60m, in addition to its historical interest, has become a real biological oasis.
Fiat BR20 aircraft
Fallen during World War II, the Fiat BR20 was the first Italian bomber to be built entirely of metal. The wreck lies at a depth of 47m, right in front of S. Stefano al mare and offers the opportunity to admire, in their surprising integrity, the machine gun, the bullets and both propellers. In addition to its undisputed historical interest, this wreck is also important from a biological point of view: the structure of the plane has in fact become a refuge for many marine species.