A japanese fishing boat located about 30 miles east of Christchurch (NZ) brought up a large carcass in its nets in April 1977 and after measuring and photographing it, it was dropped back in the sea again, for it smelled very bad and would contaminate the catch.
Its overall length was about 33 foot and it could have been any number of things - giant sea-lion, giant shell-less turtle, basking shark, plesiosaur....
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