Welcome Audiyo,
We vacation just a little South of you every year in the Rotunda and Englewood area. This is our favorite vacation spot and go as often as we can. For the past 2 years I have been metal detecting every day during our weekly stays. My best find ever metal detecting came this year on Englewood Beach. A perfect condition working Seiko watch. I had a jeweler in Venice appraise it at $200 to $300.
I have hit all the beaches from Fort Meyers to Venice and loved every minute of it. I have to admit that I have had my best luck at Englewood, maybe because I have spent more time there. As far as sharks teeth I heard that the area around Sharkeys was best but I find more North of the main pier on Englewood. Two years ago I found some old clad and wheats at Boca Grande but last year the park manager decided that he would not let anyone metal detect there any more. If you find out this is no longer the case then by all means hit this area. The older money meant a better chance of silver but they would not let me hunt this past summer. If you find you can hunt please let me know.
Some other items intersting in the immediate area are shells and wildlife. We found a million sand dollars at Fort Meyers, A ton of shells at every beach but especially on Sanibel Island and Englewood, Starfish at Lovers Key below Fort Meyers and caught crabs at the Venice Jetties. It is also common to see Manatees, Barracuda, Sting rays, Dolphins and unfortunately sharks. We arrived at Boca Grande just after an attack on a teen 2 years ago during the 4th of July. All of the above are reasons why we don't go in the water past knee deep.
We love the area and hope my raving was not too long. We live in the Tennessee mountains but love the area you live in.