A month after unveiling a plan to further protect sea life, the NSW Government has axed "no fishing" zones in a future Sydney marine park.

However the Berejiklian Government denies the move is a backflip aimed at trying to shore up coastal votes.

The proposal to boost marine life protection in 25 zones from Newcastle to Wollongong would have imposed restrictions on line and spear fishing in some zones, and banned fishing completely in others.

But after a swift backlash from the fishing industry and recreational enthusiasts, Primary Industries Minister Niall Blair has now announced the bans will not go ahead.

"We are taking the fishing lock outs off the table," Mr Blair said.

"We don't want to reduce the fishing access or the fishing rights when we have this marine park."

He said he was making the announcement ahead of the close of consultation to "allay the fears" of fishers.

"What I didn't want was the uncertainty and fear to continue in a sector that is not the target," Mr Blair said.

Fishers said the marine park protection zones would destroy their livelihoods and lifestyles. ( ABC News: Kerrin Binnie )

The Shooters, Fishers and Farmers Party had been campaigning hard on the issue and were planning to use the issue to target vulnerable Government-held seats on the coast.

But Mr Blair denied the Government had changed its mind over concerns it would lose votes.

"Let's be clear this is not a backflip," Mr Blair said.

"The final decision had not been made yet — we are in the consultation period but it is clear there is no appetite for us to restrict fishing rights or access."

Sydney Marine Park campaigner Daisy Barham condemned the Government's change of heart, saying it pre-empted the consultation process.

"A marine park that doesn't have highly protected sanctuary zones is like having a national park that allows hunting — it simply isn't going to protect our marine environment," she said.

Greens MP Justin Field described it as a "disgraceful backflip" from an "anti-science, anti-environment" Government.

"There has been a concerted effort by vested political, industry and media interests to pressure Liberal/National MPs in marginal seats and it is disappointing the Government has allowed these interests to undermine democracy and the consultation process," Mr Field said.