Hi everyone!
I found this fang-looking thing last year at Big Brook in Monmouth County, NJ. I recovered it from the stream bed. It has multiple rows of serrations running from bottom to top, and some indentations, too. I've attached pictures of it next to a ruler to show its size and multiple pictures of it from different angles. This picture of it pinched between my fingers shows the bottom on the "fang." Thank you in advance for any help you can give!