Arraia Reef is located in a bay (Silveria swimming zone) sheltered from the wind and currents by Monte Brasil, the volcano of Angra do Heroismo. This dive site is a mix between a shallow rocky bottom where fish and ... Arraia Reef is located in a bay (Silveria swimming zone) sheltered from the wind and currents by Monte Brasil, the volcano of Angra do Heroismo. This dive site is a mix between a shallow rocky bottom where fish and other organisms shelter, feed and mate as well as a large sandy area that gets progressively deeper as one swims outwards from the bay. In terms of the diversity of species that can be seen throughout the year, it is one of the richest reefs of the island; many species of the wrasse family, 3 species of rays, 3 species of morays, octopuses, large schools of fish during the summer, nudibranchs,…