The Tubarão River is a river in the Brazilian state of Santa Catarina. It originates from the confluence of the Rocinha river and Bonito river in the municipality of Lauro Müller. The Tubarão River flows from the Serra Geral foothills to the Southern Santa Catarina Lagoon System, 75 miles away. The main tributaries are the Braço do Norte river, Capivari river, Lara…The Tubarão River is a river in the Brazilian state of Santa Catarina. It originates from the confluence of the Rocinha river and Bonito river in the municipality of Lauro Müller. The Tubarão River flows from the Serra Geral foothills to the Southern Santa Catarina Lagoon System, 75 miles away. The main tributaries are the Braço do Norte river, Capivari river, Laranjeiras river and Congonhas river by the left bank and the Palmeiras river and Azambuja river by the right bank. The major tributary, the Braço do Norte river is, actually, larger than the Tubarão River.