Comment by strangattractor

Maybe their population size explains a difference. Say 10% of a billion people can afford expensive fish - 100 million people. 1/3 the population of the US. One might also notice the preponderance of Chinese fishing vessels in areas far from China. [1] And just maybe those vessel are not properly identifying themselves so the true numbers are unknown. [2]

Just maybe the fishing grounds close to Chine are all fished out.

[1] https://dialogo-americas.com/articles/chilean-navy-increases...

[2] https://globalfishingwatch.org/data/analysis-reveals-false-v...