Bombinhas is a municipality in the state of Santa Catarina in the South region of Brazil. It is the smallest municipality of that state in terms of …Bombinhas is a municipality in the state of Santa Catarina in the South region of Brazil. It is the smallest municipality of that state in terms of area. The municipality contains part of the 17,104 hectares Marinha do Arvoredo Biological Reserve, established in 1990.