Aquarium fish are being dumped in Western Australia rivers by pet owners . Goldfish are growing from the regular threeg to 2kg and koi carp to 8kg . The exotic species compete with 10cm long native fish for food and habitat . They also introduce devastating parasites and diseases onto local species .
Aquarium fish are being dumped in Western Australia rivers by pet owners . Goldfish are growing from the regular 100g to 2kg and koi carp to 8kg . The exotic species compete with 10cm long native fish for food and habitat . They also introduce devastating parasites and diseases onto local species .