TBH it’s the wealthier and developed countries who are taking more than their fair share tho. Though I’d readily admit that wealthy Chinese are also guilty of driving up the demand for many reef fish we consider to be delicacies. Or shark’s fin…all my relatives insist on serving it at their weddings and stuff even though I personally don’t see what the big deal is. (It’s kind of become a status symbol just to show off imo.)
And the main problem is people using extremely destructive fishing methods that cause long-term damage to the seabed and corals where many species of fish spawn, which impedes the repopulation. Like the way trawlers often drag a heavy metal frame across the sea floor (dredging). This kind of fishing by big corporations is a lot more destructive than what subsistence fishermen in developing countries use, normally. It’s unfortunate especially as those people who depend on smaller scale fishing get hurt by the damage to the seabed caused by the giant trawlers.