The expansion of aquaculture often faces challenges related to environmental impacts and social acceptance, particularly when involving exotic species. In Argentina, where marine aquaculture remains marginal, recent proposals for salmonid farming in Tierra del Fuego province (TDF) have sparked public debate, balancing economic development against environmental concerns. In response, the local government enacted Law 1135/2021, banning salmonid farming in the province. This study explores public attitudes toward exotic salmonid aquaculture in TDF using a mixed-methods approach, combining press discourse analysis with an extensive online survey. Results indicate strong public resistance to net-pen salmonid farming in the Beagle Channel, especially among TDF residents and individuals linked to environmental sciences. In contrast, land-based aquaculture and farming of native species receive more support. Most respondents doubt the economic benefits of salmonid farming, and nearly 80% of TDF residents support the ban. Notably, while there is strong opposition to new exotic introductions, most respondents do not support eradication of established salmonid populations, which are widely accepted due to their long-standing presence and importance for recreational fishing. These findings reflect the nuanced views of the local community and emphasize the need for socially informed and transparent regulatory frameworks for aquaculture development in ecologically sensitive regions.