Indyvidual,

If mainstream media was reporting evidence of all causes of ocean fish depletion and seagrass and coral devastation, subject of impact of amateur fishing would be irrelevant.

Sewage nutrient pollution and SOLUTIONS should be in focus.

Conflicting reports about the state of the GBR should not exist, truth should be obvious.
How can amateur fishers be held responsible?
During about 2016 the South Pacific Community reported populations of the four main tuna species in the Pacific had reached historically low levels. However this news was not covered by Australian MSM.
Fact is amateur fishers virtually don't fish for the main species of tuna, really because they cannot be caught from shore. Ocean-going bigger boats are needed and not many people have those available.

Also, only about 50 years ago science was reporting humans were too few in number to catch and use so many fish because there were far too many fish in the ocean, and fish were prolific breeders.

Looking at reality instead of incomplete scientific data its easy to see ocean fish depletion is due to habitat devastation, seagrass food web habitat ecosystems can no longer produce enough food to feed wild fish populations. Fish are not immune to starvation.
Even aquaculture industry in Australia is sometimes having to import fish to feed farmed fish in Australia
The billions of anchovies and herring and pilchards that no longer exist were not caught by amateur fishing.

The state of the whole ocean involving ecosystem damage and devastation is a scandal because it continues unchecked, unreported, gagged, and suppressed. Scientists seem frightened to discuss fact its governments that are dumping the sewage.

Look at Florida. Is the GBR unique with coral not impacted by the deterioration of ocean water quality?
http://floridakeys.noaa.gov/coral-disease/

What damage and destruction will occur from now on while sewage nutrient pollution worsens unchecked while emissions spin doctors waste time trying to blame CO2 emissions?
Is that why the impact of sewage wastewater nutrient pollution is being ignored in Australian media news? Consequences of fish depletion involving skyrocketing cost of fresh wild fish are serious?

http://www.analyteguru.com/t5/Blog/Nutrient-Pollution-in-Wastewater-An-Emerging-Global-Problem/ba-p/3193#:~:text=Due%20to%20human%20activities%2C%20large,algae%20growth%20(algal%20bloom).