In Southern Brazil, Simões-Lopes et al. [6] reported bycatch of southern right whales calves by gillnets and Zerbini and Kotas [42] related that baleen whales can be released alive from entanglement, but sections of net may remain attached to their bodies. In most cases, deaths occur among calves due to their relatively small size. In the state of Paraná, Southern Brazil, Przbylski and Monteiro-Filho [43] related the sighting of one southern right whale which remained a few days with fishing net stuck in its head. According to fishermen, as there is an increase of fishing in oceanic and coastal areas, larger numbers of nets are positioned in the water, increasing the number of cetaceans killed [42] and [44]. Baleen whale entanglement has been regarded as both a major challenge for preservation efforts and a threat to the well-being of each affected individual [15].