Tom, you're being a bit harsh on the poor fish farm owners. How often do hundreds of thousands of Atlantic salmon escape into the wild? And why would they be expected know about high tides and tidal surges and eclipses and all that science-y stuff? 
http://www.seattletimes.com/seattle-news/environment/oops-after-accidental-release-of-atlantic-salmon-fisherman-being-told-catch-as-many-as-you-want/