The lake annually produces 400,000 metric tons of milkfish (Chanos chanos) and tilapia. It supplies 70 percent of the fish requirements of Luzon and parts of the Visayas, aside from various marine products caught in open waters, government records showed. Local fishermen asserted their rights over the fishing ground that, according to a 2005 report by the LLDA, this led to some “serious conflict” between them and fish pen operators. Some fishermen were killed in the ensuing feud, the report said. “Fish pen operators, particularly the bigger ones, employed armed goons,” a Cardona fisherman said. “They would fire at us or ram our boats when we came close to their pens.”

Cinco, M. (2017, January 4). Small fishermen lose out in fight for fishing areas. Philippine Daily Inquirer, p. A4.