All five oyster harvesting areas along the Shoalhaven River, on the New South Wales south coast, will remain closed, despite recent signs that salinity levels may be near returning to normal.

The Federal Government has taken steps to reduce long-term pollution in a Port Stephens creek, in the New South Wales Hunter region, which has been closed to oyster harvesting due to contamination.

Around 60 per cent of New South Wales' oyster farms remain closed after the heavy coastal rains last month.

Gulf of Carpentaria trawler operators say banana prawn catch sizes have increased this season despite Queensland Government research that shows a drop in fisheries production.

Professional fishermen say a new size limit for snapper in the Wilson Inlet near Denmark, in southern Western Australia, will mean many fish are wasted, resulting in more pressure on other species.

A buyout of South Australian and Tasmanian oyster farms will form what is said to be Australia's biggest supplier of Pacific oysters.

Barramundi farming is leading the charge in the growth of Queensland's aquaculture industry.

The CSIRO says waters off SE Australia are warming up faster than anywhere else in the southern hemisphere.

Researchers are warning against using a surge in fish stocks in the Wilson Inlet, in southern Western Australia, to measure the estuary's health.

SunFish Qld says news that the State Government will spend $3.7 million upgrading boat ramps in the region is a good start to addressing the concerns of boaties.