Caldeira

Caldeira brings together the overlapping remains of at least two vessels, with traces dating from the 19th century to the early 20th century. As of 2017, researchers had not yet identified the ships or the causes of the wrecks. The name was given by fishermen, after an old ship propulsion boiler visible among the wreckage.

The remains are spread over about 10,000 m², and among them are two propeller shafts about 50 m long, one lying crosswise to the other, as well as two propellers and two boilers. During winter storms, the backwash can leave the structure exposed on the ebbing tide, which speeds up the deterioration of the wreckage.

The wreckage is colonized by red and green macroalgae and by rhodoliths, with a rich benthic community of ascidians, sponges and coelenterates. Small crustaceans in commensal relationships also appear. The water is usually around 22 °C in winter and 26 °C in summer.