A significant investigation is currently under way following the appearance of extensive yellow foam and numerous dead marine creatures along South Australian coastlines, particularly at Waitpinga and Parsons beaches in Victor Harbor. Over 100 surfers have reported experiencing various health issues, including cold symptoms, allergy-like reactions, itchy eyes, coughing, and breathing difficulties after contact with the water or foam.
Visual evidence of the problem has emerged, highlighting large amounts of foam and dead fish, including several leafy sea dragons, strewn across the beaches. Anthony Rowland, a surfer, shared that he and many others faced sore throats, dry coughs, and irritated eyes, with some experiencing blurred vision for about 24 hours. This situation prompted concerns among local authorities and led to the temporary closure of the affected beaches as the Department of Primary Industries and Regions (PIRSA), Environment Protection Authority (EPA), and SA Health begin their investigations.
The EPA has noted reports of red staining on the sand, with plans for crews to collect water samples for analysis. The situation is thought to stem from a microalgal bloom, a harmful occurrence triggered by a combination of warmer temperatures, stagnant water, and a prolonged marine heatwave, which has lifted sea temperatures compared to averages.
SA Health’s principal water quality adviser, David Cunliffe, indicated that exposure to harmful algae can induce allergic responses, including respiratory and eye irritation, skin rashes, and potential stomach upsets or flu-like symptoms upon ingestion. However, these symptoms typically resolve once exposure ceases or after cleansing with clean water. Residents are advised to avoid contact with discoloured water and to wash thoroughly if they have been in such areas.
Additionally, PIRSA is investigating the causes behind the fish and seahorse mortality, considering factors such as environmental conditions, disease, and pollutants. The agency highlighted that events leading to fish kills can result from various environmental factors, including temperature fluctuations, rainfall patterns, and water quality issues.
In summary, public health and environmental authorities are closely monitoring the situation, providing guidance to those affected, and working to identify the root causes of this alarming incident.