TASMANIA'S multi-million dollar seafood industry is nervously awaiting tests on a new algal bloom on the East Coast.
Shellfish in Great Oyster Bay are being tested after the bloom that damaged fisheries last year recurred, The Mercury reports.
Fishing groups and producers fear another industry shutdown after the deadly toxin-producing algae swept through fisheries.
Tasmanian Rock Lobster Fishermen's Association chief executive officer Rodney Treloggen said it would be bad news for the industry.
"All we've been told is that it has recurred in Great Oyster Bay and there are high readings there, and that up our way, Ansons Bay and surrounds, there were lower levels," Mr Treloggen said.
"We're still waiting to hear results. We just hope it's isolated to that area."
Last year a ban was slapped on eating wild shellfish from much of Tasmania because of a toxic algal bloom.
The discovery of algal toxins in mussels prompted a worldwide recall of the exported shellfish.
Scallop fishers prematurely ended their season in December because of the disease, which also affected abalone and rock lobsters.
Primary Industries Minister Bryan Green said further tests were being done as promised.
"I was advised that there has been further testing done as we have committed to," Mr Green said.
"We are undertaking tests on bivalves [e.g. oysters, mussels] now, and we'll understand the impact of that with a view to making a decision whether or not those fish can continue to be exported and at the same time allow us to understand the situation with crayfish as well.
"Suffice to say, if the toxicity is above the acceptable levels, we'll have to close the fishery."
The rock lobster industry is worth more than $60 million a year and abalone $97 million.
There has been concern the rapid warming of eastern Tasmanian waters had caused the problem with the algae alexandrium tamarense, which creates a dangerous toxin.
Read more at The Mercury.