How does lack of sustainable development by over fishing in south america impact the united states?

Lack of sustainable development by over fishing in South America impact the United States by where fish stocks become too depleted to recover. With oceans taking up over 70% of the Earth, sea creatures and the overall health of marine life is essential for sustaining life elsewhere on the planet, but overfishing is having drastic effects on the future of both ocean and land dwellers. 
 
In other words,it causes:
1) the fishing industry to go down
2) Lack of knowledge regarding fish populations
3)Removal of essential predators, such as the animal cycle
4) causes large amounts of algae
5) Threat to local food sources in some places
6) Financial losses, such as many people relying on the fish to reproduce