[OldPossum]

...they told me sharks could be in it that they could have made their way up from the ocean lol.

That's actually possible. The author of "Jaws" was partly inspired by the true story of a Great White" that swam up a river (I believe, in New York State) and killed and ate a young boy.

[wtc911]

Matawan Creek - Toms River NJ - 1916 - two boys swimming 11 miles from ocean killed by shark.