Possible Freshwater shark?

As the weather warms up (earlier this year than in recent memory), the lake is already seeing a number of boaters and swimmers.  With the increase of lake visitors, the probability of Nibbler sightings in on the rise.  Recently, scientists have theorized that some more famous lake dwellers (Champ and Nessie) might actually be a rare freshwater shark.  Since these sharks are seldom seen, but do inhabit inland lakes and rivers, it might be possible that the Nibbler is also one of the sharks.  Although the physical description of the Allatoona Toe Nibbler varies greatly from that of a shark, the possibility still remains.  As always, please report any sighting promptly along with any pictures and exact location on the lake.