That was down by about half from the previous year's result.

The company is spotting signs of improvement and saying it is well positioned for the future.

Tassal felt the pandemic's effects on salmon and prawn market pricing, managing director and chief executive Mark Ryan said.

"Export revenues were heavily impacted by the fall in global salmon pricing, in addition to the elevated cost of air freight, which saw returns from this channel evaporate.

"Weak global pricing flowed through to domestic pricing and we saw impacts in both the wholesale and retail channels.

"After a challenging year, several of the headwinds we experienced in financial year 2021 are currently abating."

Mr Ryan said Tassal had a "unique platform" with world class aquaculture operations, a great team, strong brands and diverse distribution channels.

"When coupled with improving cashflow and a supportive balance sheet and funding profile, we are confident the work we have done on the factors within our control positions us well for the future," he said.

Tassal managed revenue growth of 5.6 per cent to $594 million.

It said that was due to strength in Australian salmon sales and a growing contribution from its prawn business.

"Market analysts are currently forecasting a demand recovery in global salmon markets in 2021, with food service returning as lockdowns ease and vaccines are rolled out, which is likely to drive global price rises," Mr Ryan said.

The Tasmanian salmon industry has come under increased fire from environmentalists in recent times, with much media attention and prominent author Richard Flanagan writing a book, Toxic, attacking its environmental record.

"This coverage has been challenging for our industry and the communities within which we operate," Mr Ryan said.

"Like previous coverage, many of the criticisms in the book, Toxic, are inaccurate, baseless or not supported by independent experts or scientific facts ...," Mr Ryan said.

"Nevertheless, these issues are unsettling for our people and our communities and, as a company, Tassal takes it very seriously.

"We are taking the opportunity to provide greater visual transparency under the waterways in which we operate to directly showcase the fact that we farm in a healthy marine environment."