RecFish SA has mobilised a citizen science campaign to investigate the consequences of the algal bloom affecting coastal areas.

It has observers around the state, rolling out stomach content sampling, independent pathology and ocean reef research dives in fish kill areas. 

This includes Kangaroo Island, the South East, southern Fleurieu, and areas on Eyre Peninsula and Yorke Peninsula. 

EPA testing has confirmed the presence of microalgae Karenia Mikimotoi due to a marine heatwave, causing mass fish deaths, with toxic yellow-green sea foam affecting beaches.

Surfers and beachgoers have suffered coughing and breathing difficulties, itchy eyes and blurred vision.

This week RecFish SA and Sea Wolves Dive Club have been auditing offshore reefs around Victor Harbor and the south coast - assessing abalone, lobster and reef fish mortality. 

Kangaroo Island, Alexandrina and Victor Harbor councils have issued warnings for people to be cautious in and around the water, with SA Health advising people to avoid swimming in affected areas and avoid discoloured water.

SA Health says fish caught live are safe to eat, however dead fish and cockles should not be taken for human consumption due to issues associated with decomposition and spoilage.

The south coast councils are rolling out signage highlighting safety precautions at local beaches ahead of the school holidays and Easter period.

City of Victor Harbor restarted operation of its Horse Drawn Tram service to Granite Island yesterday, Thursday 10 April, after a three week hiatus.

Waitpinga Beach and Parsons Beach, where significant levels of the bloom were first detected in early March, have now reopened after algae levels reduced. Visitors to those two beaches should still follow SA Health’s advice and avoid entering the water if it is discoloured or foamy.

Responding to community concern, Kangaroo Island council says water quality in ocean environments, including the Kingscote Tidal Pool, can vary due to tides, temperature, rainfall and other environmental factors. 

“While there is no evidence of any dangerous risk at this time, individuals are encouraged to assess their own health and comfort levels before entering the water.”

Conditions are expected to persist until there is a major change in the weather; the EPA says the microalgae will dissipate naturally over time depending on wind, swell and tidal conditions. It will continue to monitor the bloom. 

To report unusual water conditions contact Fishwatch on 1800 065 522, or the EPA on 1800 623 445 or via email. For the latest information visit the SA Health Water Quality Alerts page on its website.