Shark experts from around the world are meeting in Sydney today to discuss the best technologies available to stop shark attacks.

The summit was called after a number of attacks and sightings in New South Wales this year, including a fatal attack on a Japanese Surfer at Ballina on the north coast in February.

An independent review into shark deterrent technologies, commissioned by the NSW Government, identified a number of options for potential trials in NSW waters, including electrical and physical barriers, sonar detection and tracking.

However, the review found that only one deterrent - a shark spotting program - was suitable for immediate trial.

About 70 experts have gathered at Taronga Zoo to discuss the results of the review.

They will discuss ways to develop other ideas, including bubble curtains, shark repellent cables and personal shark shields.

Lecturer in Public Policy at the University of Sydney Christopher Neff is among the speakers and said netting and culling sharks would be out of step with public opinion.

Dr Neff said new research showed more than 80 per cent of people in the Ballina and Byron shires are opposed to killing sharks.

"The data that I've seen for the last three years whether it's from WA, whether it's from Sydney or whether it's in Cape Town or whether it's in Ballina have all said, 'don't kill the sharks'," Dr Neff said.

"The only people who are talking about killing the sharks usually, is the political class.

"The public is sophisticated and the public generally gets it, that there are better alternatives that will make them safer."

Ballina Mayor David Wright said the community is hoping the summit produces some concrete recommendations.

"We've had the committees, there is an Upper House committee that is looking at this as well but this is all the scientists," Mr Wright said.

The scientists attending are from Australia, South Africa, Hawaii and North America where great white sharks are prominent.

"So if they can't come up with solutions with the top people there, there won't be solutions," he said.

Minister for Primary Industries Niall Blair said the Government would leave "no stone unturned to make sure we look at new and innovative ways to protect our beaches."

Premier Mike Baird has previously said shark nets should be considered along the NSW north coast.

However, Mr Baird said he would prefer deterrents that do not require nets.