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  5. 05-08-2025

Estuary event details

Estuary Anglesea River Estuary
Region Corangamite CMA
Event type Fish
Date and time 5 August 2025 11:45am
Description
  • Flows from Marshy Creek reached the Anglesea River estuary on the 25/07/2025.  At the time, the pH of water recorded at the 235260A  ANGLESEA RIVER (MARSHY CREEK) @ ALCOA monitoring station was 3.8.
  • Fish deaths were observed at Anglesea River estuary since Tuesday 5 August and continued throughout August. 
  • On the 15th of August a Corangamite CMA staff member walked the water line at the river mouth and recorded 70 dead Yellow-eyed Mullet, 1 Australian Salmon and 8 Flounder and 2 Black Bream.  (to give you an idea of length, her shoe is 27cm in length. )
  • By the 20th of August, there were more Black Bream found dead some of them were over 40cm in length.  (black lines on stick in images are 10cm apart)
  • Fish death are likely to be cause by the acidity of the estuary and flocculation, which is a physical-chemical process of suspended particles clumping together, often resulting in altered clarity and colour (this can be observed as a milky blue appearance). 

 
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