The ocean is acidifying. It is not basic human activity but planned acidification.

When hunting meat that is exposed to stress hormone like adrenaline taints the meat and makes it not as appealing in taste or quality.

I have never heard about stress related fish but it would make sense that their meat would also be impacted by stress hormones from acidification, radiation and other pollution.

[url=http://explorations.ucsd.edu/research-highlights/2013/research-highlight-rising-ocean-acidification-leads-to-anxiety-in-fish/?utm_source=Scripps+Oceanography%27s+explorations+now+E-Publication&utm_campaign=437b76e3bf-explorations_now_10_3_2013&utm_medium=email&utm_term=0_8195ea6596-437b76e3bf-90797493][/url]