Lake Placid (1999) Review
A local sheriff (Brendan Gleeson) pulls a diver out of Black Lake (they wanted to call it Lake Placid, but that name was already taken), only to find that he's been bitten in half. What they find is a tooth, and this gets sent to a museum for analysis.
The tooth ends up in the hands of Kelly Scott (Bridget Fonda), who doesn't usually do field research, and most certainly not in Maine. But because her boss - and boyfriend - has decided to do a little extra-curricular activity of his own with her friend, she ends up in the backwoods. This may or may not be a good choice.