High concentrations of CO2 in seawater can cause fish to become intoxicated - a phenomena known as hypercapnia. UNSW’s Ben McNeil and Tristan Sasse explain how a rise in our oceans’ CO2 levels could have huge implications for global fisheries and marine ecosystems.


Carbon dioxide concentrations in seawater could reach levels high enough to make fish “intoxicated” many decades earlier than previously thought, with serious implications for the world’s fisheries.