Hoki production had to return to a fillet block focus for retail, reversing Sanford's previous shift to higher-value fillet production for food service.
"While these steps are being taken to mitigate the ongoing impacts from Covid-19, the outlook remains challenging and short-term expectations are subdued," Kuntzsch said.
Chief financial officer Katherine Turner said Sanford's balance sheet was strong, and that there was considerable "headroom" in its borrowing facilities.
"Forecasting with certainty is always difficult in the seafood business, and Covid-19 has made that harder than usual," Turner said.
"However, we have confidence in our strategy to deliver improving results in the medium and long term," she said.
Kuntzsch said operationally the company was performing well "and all our people are highly engaged and working hard to help Sanford adjust to a new normal".
Shares in Sanford last traded at $5.70, down 15.5 per cent over the past 12 months.