First off, i saw this film over a decade ago, so don't expect a full autopsy on how 70's the film was, or the plot holes. Looking back at these reviews, i must say that my memory of the plot is pretty good. Personally, when i saw this film I thought it to be pretty intense. The plot was not entirely bad. Sure it was inplausible that richard harris picked on the one genius killer whale in the whole atlantic. But am i to believe that non-human animals don't have emotions that include vengeance? No, i don't believe that at all. We hairless primates should learn not to ascribe any moderately complex emotion solely under the category "human".
To me, the real strength of this film was its allegory to the destruction of nature. I don't think it entirely inplausible that the writer wanted to symbolize the strife between man's greed, and the annhilation of this planet's animals and ecosystems. The point could have been, that our own planet at some critical point might strike out at us.
And come on you guys, after watching "JAWS" you want killer animal flicks that conform to modern day science? You're telling me that great whites do, in fact, stalk tourist filled beaches as if they were seal colonies? Now look who's living in the 70's.....
peace.