which of the following chemicals is used to paralyze and catch reef fish mostly in se asia

Out of the chemicals you might not see listed due to search restrictions, the one used to paralyze and catch reef fish mostly in Southeast Asia is:

Cyanide

Cyanide is a highly toxic substance that disrupts cellular respiration in fish, essentially suffocating them. It’s a dangerous and destructive practice for the environment, harming not only the targeted fish but also the surrounding coral reefs and ecosystem.