Great White aka the Last Shark (1981)

When Vic Morrow exclaims "I've never seen anything like it in my whole life"...it was a bold-faced lie. In fact, millions, including Morrow, had seen something exactly like this piece of shit/stroke of genius a few years prior, and it was called Jaws. The producers of Great White were subsequently sued by Universal for plagiarism and the movie was banned from theaters.

FUN FACT: Morrow was killed a year later on the set of The Twilight Zone movie after being decapitated by a helicopter.

Buy it here.