Thousands of dead fish have reportedly washed ashore in recent days, with many believed to be sardines. The grim discovery has been reported at beaches including Pollock, Hobie, Kings and Humewood, raising serious questions about what could be behind it.

Thousands of dead fish have reportedly washed ashore in recent days, with many believed to be sardines. The grim discovery has been reported at beaches including Pollock, Hobie, Kings and Humewood, raising serious questions about what could be behind it. Scientists are now investigating the cause — but what exactly is happening beneath the surface?  Guest: Dr Janet Claire Coetzee: Fisheries Scientist · South African Department of Forestry, Fisheries and the Environment