Is China going to kill off all the world's fish?

Veteran China-watcher ‘Serpentza’ says that China is operating a massive illegal raid on fish stocks – including protected species. According to him:

Officially China has 2,500 ships in its fishing fleet, as compared with the USA’s 300; but the real figure is estimated as closer to 17,000. 

The ships can stay out for years because of a support system of large vessels that resupply them with fuel and other necessaries, and collect up the catches from from many ships and take them back, refrigerated, to the mother country. The fishing fleets can stay on station, so foreign nations’ sovereign coastal stocks are under constant siege.

The fishing is hi-tech and indiscriminate, and law-breaking: against international law, the ships play about with the transponder system that lets them be tracked, so that they can turn off their transponders, raid other countries’ waters at night undetected and then go back outside the sovereign area and turn the signals back on. The leaders of corrupt countries are bribed to cooperate or look the other way. 

Sensitive, protected zones such as the waters around the Galapagos Islands are being trashed, for the second year running. Species protected by law, such as the hammerhead shark, are not only caught up in the vast nets but especially prized in China, commanding higher prices as a result.

These activities are not, says ‘Serpentza’, illegal in China itself, so little or nothing will be done there.

Will fish and other marine wildlife go the way of the tiger, the rhino and all the rest? What will the sea be like when this ‘grab it all today’ madness comes to and end?