An international team of marine biologists has found mesopelagic fish in the earth's oceans constitute 10 to 30 times more biomass than previously thought.
"This very large stock of fish that we have just discovered, that holds 95 per cent of all the fish biomass in the world, is untouched by fishers," he says. "They can't harvest them with nets. In the 21st Century we have still a pristine stock of fish which happens to be 95 per cent of all the fish in oceans." "And that also changes our views on ocean health."
https://phys.org/news/2014-03-ninety-five-cent-world-fish-mesopelagic.html