Fish deaths likely ‘blackwater event’

The scene of fish floating in the river confused locals and tourists.
The scene of fish floating in the river confused locals and tourists.

On Tuesday 29 March, Primary Industries & Regions SA (PIRSA) Fisheries and Aquaculture was alerted to a fish kill of approximately several hundred bream at Harriet River, Kangaroo Island. 

PIRSA says no toxic algae has been discovered in their samples.

PIRSA says no toxic algae has been discovered in their samples.

A collaborative investigation involving PIRSA and Department of Environment, Water and Natural Resources (DEWNR) is underway to determine the cause of the fish kill.

Water and fish samples have been collected from the scene for diagnostic testing. However, early investigations and site visits indicate the likely cause is a blackwater event of stagnant water and low dissolved oxygen. 

Fish kills of this nature are not uncommon in SA waterways. No toxic algae has been detected in the water samples collected by DEWNR.

Fish kills should be reported to the FISHWATCH 24 hour hotline 1800 065 522.

Please note, dead or dying fish found during any fish kill event are not recommended for human consumption.

Visit pir.sa.gov.au/fishing/fishwatch for more information on FISHWATCH and how to report incidents.