Factory trawler Geelong Star has been banned from fishing after the deaths of seven albatross.

The Australian Fisheries Management Authority (AFMA) imposed the ban after a "higher than expected level of albatross mortalities" on the ship's last fishing trip.

It will not be allowed to fish again until the operators agree to additional mitigation measures imposed by AFMA.

The operators of the controversial trawler, SeaFish Tasmania, told a Senate committee late last year that nine dolphins and 12 Australian fur seals died during the vessel's first three trips to mid-June 2015.

There have been two further fur seal deaths since then.

Last year, the 95-metre freezer trawler was banned from fishing as a result of the mammal deaths.

In a statement, AFMA's acting chief Dr Nick Rayns said the authority would continue to work with the operator and seabird experts until it was satisfied additional mitigation measures would be effective.

"An AFMA observer and an electronic monitoring system will continue to monitor the vessel's fishing operations, providing 24 hour ... coverage of the vessel," he said.

"Occasional and untended interactions with protected species do occur in fishing operations, including with the Geelong Star.

"However when five albatross were killed in a single shot [of the trawl net], AFMA took action to implement additional mitigation measures as this was higher than expected."

A spokesman for the Small Pelagic Fishery Industry Association, of which Seafish Tasmania is a member, told last year's Senate committee hearings that mammal deaths were reported to AFMA within 24 hours.

He also added that more than 100 trawls had been undertaken since mid-June, indicating mitigation measures were working.

The Geelong Star's activities have faced strong opposition from environmentalists and recreational fishers, but the Federal Government argues it is strictly regulated.