Some scientists estimate that nearly all current fisheries could disappear in our lifetimes due to overfishing and destructive fishing methods.
Global fishing catches have been in decline and many stocks have collapsed completely.
Some 90 per cent of all big fish in the ocean have vanished, and the future of the hundreds of millions of people who depend on fish for their protein is in the balance.
The picture for anglers and our fishing industries might be grim, but former UWA academic David Ritter says there are simple solutions and it's not too late to act.
David Ritter is a lawyer from Perth who is now based in London, where he runs the oceans campaign for Greenpeace UK.
In a free public lecture at UWA, titled: "The End of Fish?", Mr Ritter will speak on the problems causing declining fish stocks, Greenpeace UK's campaign and possible solutions.
The lecture will be at 6pm on Thursday 28 August at UWA's Social Sciences Lecture Theatre. The lecture is free and open to the public, no RSVP required.
(The lecture is part of UWA's Institute of Advanced Studies lecture program. More details at http://www.ias.uwa.edu.au/lectures/2008/ritter )