Authorities in South Africa are investigating a reported increase in pelagic fish mortality along the Western Cape’s West Coast. Multiple outlets describe the event as a worrying trend, with sardines identified as the most affected species. The reports note that investigators are working to determine what is behind the die-off, but no single cause is confirmed in the available coverage. The investigation is framed as an effort to understand potential environmental or ocean-related factors that could lead to fish deaths at the coast, and to assess the scope of the problem. Authorities are expected to continue monitoring affected areas and collecting information as they examine the conditions linked to the mortality. While the reports agree on the scale and that sardines are heavily impacted, they differ in emphasis on what may be causing it, and do not provide a definitive explanation in the excerpts provided. The situation remains under investigation.