Researchers find the invasive species weighing 2kg and up to 30 cm in length
Enormous goldfish and other pet fish have been found in the rivers of Australia by researchers who believe they were released by their owners.
The common misconception of the goldfish as a small, domesticated species best suited to an aquarium has been challenged yet again by scientists who have warned of their damaging impact on natural ecosystems.
Researchers at Murdoch University in Perth have caught goldfish which tipped the scales at up to 2kg and grew up to 30cm.
They have warned that goldfish and other abandoned species such as koi carp are destroying habitats for native breeds of fish by eating their spawn and uprooting plants and sediment on the river bed.
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