There is no need to overstate it, aquaculture has been the world’s fastest-growing food production sector for decades, and it will remain so for at least the next two decades. During the last two decades, aquaculture has evolved from a relatively minor role to play a mainstream part in the global food system. Freshwater fish such as carps, tilapias, and catfishes have the lion’s share in global fish production, predominantly originating from smallholders. Freshwater fish contribute more than any other aquaculture sub-sector to the total volume, rural livelihoods, and food and nutrition...

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