The number of protected turtles hooked by commercial fishers along Australia's east coast has jumped tenfold over the past five years, sparking fears for the fate of vulnerable ocean life as the Turnbull government moves to tear up marine sanctuary protections.

An analysis of government data has also revealed an increase in the number of dolphins and whales, as well as seabirds such as albatrosses, ensnared by commercial fishers since 2012.

However the latest data was not included in a report to government on the wind-back of marine protections, which relied on evidence gathered before the spike was recorded.

The Turnbull government in July released draft changes to the 3.3 million square kilometres of Australia's protected offshore regions, which were expanded in 2012 by the former Labor government.