named 'cagarras' as a result of the large amount of birds' excrement staining the rocky shores of the islands, this area is home to thousands of birds, corals, and over 150 different species of fish.  general underwater visibility around.

the ilhas cagarras varies between 4 and 8 meters, however, in some instances, visibility can reach over 15 meters, due to a special phenomenon called 'mare roxa' (purple tide), caused by antartic waters reaching the shore and resurfacing.

the beauty of the cagarras islands can be experienced through organized tours, boating, snorkeling and scuba diving, and always following the rules of minimal impact and sustainable eco-tourism.  the archipelago  is also used for sports such as canoeing and climbing, but landing or docking on any of the islands is forbidden without previous authorization by the city.