In 1990 Australia had 22 exotic fish in our waterways and now we have about 34. All the newcomers, bar one, originated from the aquarium trade.
So it is great to see Agriculture Minister Peter McGauran announce that the States and Commonwealth have finalised an Ornamental fish agreement which will now be implemented. It is a really complex and large industry and this agreement has taken a lot of time and effort to work out. The Minister's announcement is at http://www.maff.gov.au/releases/07/07108pm.html
It is important that when people buy pet fish they know that they can become feral pests. If you move house and can't take the fish with you, don't dump them in the local lake or river. Fishermen also have to be very careful if they use live bait fish. For example Oriental weatherloach appear to have been moved from the Canberra area to the Snowy Mountains through people using them as bait. Recent genetic work by IA CRC student Gwilym Haynes indicates that the common carp infestation of Tasmanian lakes Crescent and Sorrell probably came from Wyangala Dam in NSW. Since 1995, that infestation has cost Tasmanian taxpayers millions of dollars and the lakes were closed for fishing for a decade.