article_snippet.sent: Goldfish are being caught weighing up to 2kg and koi carp up to 8kg and one metre in length, in the waterways of Western Australia amongst other exotic introduced species. '
article_snippet.sent: A lot of these fish are much larger than the native fish, so A lot of these fish prey on these fish and compete for habitat,' Dr David Morgan, the Director of the Centre for Fish and Fisheries Research at Murdoch University, told Daily Mail Australia.
article_snippet.sent: Goldfish (pictured) weighing up to 2kg are some of the exotic aquarium fish invading and destroying WA's waterways .
article_snippet.sent: The native fish in the region, such as this Balston's Pygmy Perch which has been attacked, are only up 10cm . '
article_snippet.sent: Our native fish are generally less than 10cm in length like the pygmy perch or the native minnows. '
article_snippet.sent: A huge Murray River Cod was removed from a Perth wetland in Novemeber last year: 'A lot of native fish are much larger than the native fish, so native fish prey on native fish and compete for habitat,' Dr David Morgan, the Director of the Centre for Fish and Fisheries Research at Murdoch University, said .
article_snippet.sent: Goldfish in captivity generally remain orange, grow to about 10-15 cm and weigh less than 100g – in the wild in WA Goldfish in captivity get to 2KG and 40cm,' Dr Morgan said .
highlights_snippet.sent: Goldfish are growing from the regular 100g to 2kg and koi carp to 8kg .
  
highlights_snippet.sent: The exotic species compete with 10cm long native fish for food and habitat .
  