South Australia’s biggest rock lobster fishery will operate year round for the first time in almost half a century.

The State Government is lifting a long-running winter fishing ban that covered a region from the Murray Mouth to the West Australian border.

Catch quotas will remain the same, but the fishing industry is celebrating what it expects will be huge economic benefits of fishing all year round.

The winter closure was originally imposed in the nineteen-sixties to protect spawning females and conserve egg production.

The industry commissioned research in recent years to assess the potential impact of removing the closure.

The studies found there would be no impact on the sustainability of stock.

Fisheries Minister Leon Bignell said removing the ban would appease all party.

“This is something the industry wanted, so they came to us and we did some studies and found out that it's not going to affect the number of lobster we have out there by them being fished all year round,” Mr Bignell said.

“So we think this is a win-win for the industry, but also for those customers around the world who just love our southern rock lobster.

“The quotas are still in existence so no-one will be taking anymore southern rock lobster, the numbers will remain the same, we'll just be taking them over 12 months instead of a set fishing period.”

The rock lobster industry accounts for more than 600 jobs and tens of millions in SA each year.

Commercial rock lobster fishing industries operate in South Australia, Victoria, West Australia and Tasmania, but South Australia's south-eastern fishery is now the only place where winter closures still exist.