Bahia dive sites

Chapeiroes are mushroom-shaped coral formations endemic to the Abrolhos Archipelago, found nowhere else in the world. They are formed primarily by Mussismilia braziliensis, an endemic Brazilian coral species that grows in massive columnar structures up to 5 metres tall and 20 metres across, creating flat-topped pillars separated by sand channels. These formations grow extremely slowly, with the largest estimated to be over 6,000 years old. The chapeiroes create unique habitat complexity, with overhangs sheltering diverse invertebrate communities and channels between them acting as highways for reef fish.

The Abrolhos Archipelago lies approximately 70 kilometres offshore from the town of Caravelas in southern Bahia state. The boat crossing takes 3 to 6 hours depending on vessel type and sea conditions. Liveaboard trips of 3 to 5 days are the most common way to dive the park, departing from Caravelas. Day trips are not feasible due to distance. A limited number of visitors are permitted daily under park regulations, and all visits must be arranged through licensed operators. The nearest airports are in Teixeira de Freitas or Porto Seguro, both requiring ground transfers to Caravelas.

Humpback whales are present at Abrolhos from July through November, with peak numbers from August to October. The archipelago serves as one of the primary breeding and calving grounds for the western South Atlantic humpback population. During whale season, encounters from the dive boat are virtually guaranteed, and their songs can be clearly heard underwater during dives. However, in-water encounters with whales are regulated and generally not permitted within the park boundaries. The diving itself is best from November to March when visibility peaks and seas are calmer, creating a slight mismatch between peak whale and peak dive seasons.