It’s incredible, it’s better to see it once to understand that the thrill of contemplating all this is incommensurable with any other buzz in the world. Beauty, power, quantity add vitality to me. And you? 
About 2 billion tons of fish live in the ocean waters. 
However, recently scientists were surprised to discover that the biomass of fish in the “twilight zone” and in the ocean as a whole is 10 times higher than the figure of 2 thousand million tons, which was announced by their colleagues in an article in the journal Science in 2009. 
Today, science knows about 25 thousand species of sea and river fish (combined) 
The Peruvian anchovy catch sometimes reaches 11 million tons per year. Pollock is caught a little less, but still a lot - there were years when the catch reached seven million tons. 
An interesting fact is that there has been a steady increase in surface temperatures in the North Pacific Ocean. Thanks to this phenomenon, many fish species, in particular anadromous Pacific salmon, have increased in numbers. 
It is said that in 2050 the world's population will reach nine billion people. If suddenly, for some fantastic reason, the total stocks of commercial fish begin to decrease, humanity can always count on large stocks of mesopelagic fish that live at depths from 200 to 1000 meters. 
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