Brazil
Ilha Redonda, in the Abrolhos Archipelago, is about 400 m across and 36 m high, and the low-vegetation plateau at its top concentrates the nests of frigatebirds (Fregata magnificens). Surrounded by rocky walls, the island has a sandy point on its southeast corner that reaches toward Ilha Siriba, forms two beaches and holds the largest accumulation of sand in the archipelago, a kind of tombolo of biodetrital sand with shells and dark heavy minerals. Together with Santa Bárbara, Redonda is made of sandstones interbedded with mafic rocks such as diabase or basalt, while the other islands of the archipelago are mafic rock only. The Abrolhos islands have a cuesta relief, tilted about 13° to the NNW, which is why the highest cliffs are on the south side of the islands.
Close to Ilha Redonda, macroalgae form a mosaic, with an extensive bed of the brown alga Sargassum. Surveys recorded Panulirus argus lobsters at Ilha Redonda, and across the archipelago most of them were seen at night.
In 2017, Redonda/Norte was among the least dived sites in the Park.
Information on this page, including technical data such as depth, current, visibility, access, and recommended level, is informational and may vary. Confirm actual conditions with a local operator before the dive.
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