Perth-based seafood company Australis Aquaculture Ltd believes it is the world's largest barramundi farm after announcing it had increased the number of fish at its US plant by 72 per cent over the past 12 months to over one million.

Perth-based seafood company Australis Aquaculture Ltd believes it is the world's largest barramundi farm after announcing it had increased the number of fish at its US plant by 72 per cent over the past 12 months to over one million.