The Australian Bureau of Agricultural and Resource Economics said it was mainly due to a AUD $600 million (€344 million/$489 million) drop in the value of rock lobster, prawn, abalone and tuna.
Over the same period, there's been a boom in aquaculture production, with salmon overtaking tuna as Australia's most valuable finfish species.
The mayor of the west coast of Tasmania, Darryl Gerrity, said the aquaculture boom isn't all good.
"A lot of the aquaculture people come in, work for 10 days, or for five, much like in the mining industry, whereas in the traditional fishing industry, the families actually lived in Strahan," he said.
"Now
