with marine catfish being the most present in sepetiba's waters, nearly one hundred species of fish from the ariidae, gerreidae, sciaenidae, carangidae, and sparidae families., were catalogued in the bay.

one of the most charming aspects of many beaches facing the baía de sepetiba are the many fishing boats, and the small and often improvised fish markets in the area.

there are two entrances to the bay via the ocean, one on the west side facing the ilha da marambaia, and one smaller one closer to the center of rio, in the neighborhood of barra de guaratiba.