All chain links are equally valuable and provide the most for the stability of the ecosystem. If one of them is weakened then the whole chain loses its strength. Poor thinking people will rush and say that Spearos shouldn't be a link on that chain but I would strongly answer that humans should not. Spearos, as u/w hunters, participate by following exactly the unwritten rules that nature has set throughout ages for the reason of sustainability.

When a fish is brought to the surface from the deep, its swimming bladder gets inflated by air’s increasing volume… As a result of that, its stomach is getting pushed towards the mouth and the last meal is being thrown up. Sometimes you can even see the stomach itself, reversed, outside the mouth.

If you want to learn more about the sustainable fishing factors and how Spearfishing helps towards the stability of the underwater ecosystem, join a Freediving Spearfishing WorldWide course.