Thanks. It seems they were mistaken about the total biomass.Here you go
Don't you hate it when scientists fail because their estimates are based on false premises?
http://www.universityworldnews.com/article.php?story=20140309160026308
Pardon my confusion, as marine biology is far from my bailiwick, but where are you getting the claim that the worry from the scientific community was "emptying the oceans?" I had labored under the impression that the chief worry was lowering of biodiversity. For instance, if you kill all of the tuna, then other critters that tend to be less useful for us would thrive (i.e. Harder to catch and maybe not edible). Squid, for instance.
In fact, your article touches on that:
This means there could be more than 3,000 million tonnes of mesopelagic fish in the ocean - a stock still untouched by fisheries and possibly increasing because of the decline of their main predators, tuna and swordfish.