The dune system of Katfish Reach consists of eight individual dunes centred around the Berri Saline Water Disposal Basin and on Katarapko Island.

The dunes range from 3.4 to 17.4 hectares in size and all show signs of soil erosion. All are impacted by high grazing pressure from rabbits. Kangaroos can be found across all sites. Some dunes have significant pest plant infestations.

Typical vegetation found in this type of habitat include Native Pine and Darling Lily. Turtles are known to lay their eggs in the sand of the dune systems to keep them warm and protected from predators.

Katarapko Island dunes have Aboriginal heritage sites present with varying degrees of erosion.

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