Not sure why you are being downvoted. Salmon (mentioned in other siblings) is a perfect example of over fishing, and the farmed stuff tends to be of terrible quality and fed absolute garbage/treated terribly.
Salmon is found in high-latitude systems around the globe in both hemispheres. Overfishing is something that occurs to populations, not species. Most of the salmon populations that I am familiar with are not over-fished, but have suffered from spawning habitat loss due to dams and logging. Those are major issues and they continue to negatively affect those populations; you are doing the loggers and dam builders a favor by blaming fishing, which is far easier (and more politically palatable) to regulate.
