In a significant cultural development, the Brazilian National Institute of Historical and Artistic Heritage (Iphan) has officially recognized the collaborative fishing practice involving dolphins, specifically the Lahille dolphin, as an intangible cultural heritage of the Northern Coast of Rio Grande do Sul. This practice, which occurs primarily at the mouth of the Tramandaí River, showcases a unique interspecies interaction between humans and the Tursiops gephyreus species. Pioneers of this tradition have celebrated this recognition as vital to preserving their communal fishing heritage against potential industrial developments in the area.

The fishing practice allows local fishermen to work alongside dolphins, which have been part of this community for decades, creating a symbiotic relationship that enhances the fishing experience. Fishermen have shared that dolphins like Geraldona, a female Lahille dolphin over 40 years old, have become integrated into their families, emphasizing the deep bond formed over years of collaboration. This recognition serves not only to honor the local tradition but also to protect the coastal environment against developments that may threaten this rare communal fishing practice.

Furthermore, the recognition of this cultural heritage plays an essential role in sustaining the local economy and preserving regional practices that could otherwise fade away. By classifying this tradition as cultural heritage, it provides a safeguard against industrial pressures and fosters greater awareness about the ecological and social importance of the fishing communities along the coast of Rio Grande do Sul. The local fishing community views this as both a celebration of their identity and a commitment to their future, as it firmly establishes their territory as a protected area.