A lot of sensationalism here around the use of cyanide. This is a real (but ecologically damaging) way to fish: https://en.m.wikipedia.org/wiki/Cyanide_fishing

The accusation is that Chinese fishing vessels are illegally and maliciously doing this around Scarborough, substantially hurting the local fishing industry.

This is awful, but it’s not the mass-poisoning of the food supply as this article is inviting you to conclude that it is.