Like most sharks teeth, this has a serrated edge. The root dips in the center giving the illusion of a burlette which often leads people to mistakenly ID these as "baby megs" which ironically don't necessarily have a developed burette of their own. Bull/Dusky is much thinner than what a baby megalodon tooth would be.
Lemon Sharks Teeth
These are one of the most common fossilized sharks teeth in Florida along with the Bull/Dusky
Tiger Sharks Teeth
There are many species of Tiger Shark in Florida's history A. Aduncus Example B. Physogaleus contorted Example C. Mayumbensis Example Below is a great link for more help on the different species of tiger sharks:
What you may not be able to see in the photo is that these are pretty flat teeth, with versions of both 1 and 2 bladed sides.
Megalodon Sharks Teeth
A. Large Common Shape with thick distinguished burlette B. Baby "button" meg, notice the lack of burlette at this stage. Bull/Dusky are often confused as baby megs, but these are much thicker teeth and usually look a lot like this. C. Posterior Megalodon tooth... a wider tooth with a shorter blade sat towards the back of the jaw.
Hemipristis (Snaggle Tooth) Sharks Teeth
A. Upper Hemi Example B. Lower Hemi Example, may have cusps C. Example of Hemi with feeding damage (see the bite mark across the front? The tooth was bitten on its way out of the mouth)
Mako Sharks Teeth
Makos have no burlette & no serrations. A. Upper Mako Example B. Lower Mako Example C. Baby Mako, not to be confused with the lemon
Sand Tiger Sharks Teeth
Often broken and very pointy. The sand tiger shark is often confused with the lower hemipristis. A couple of differences are that the sand tiger is a much thinner tooth, and the cusps come from the root where the hemipristis has cusps coming from the blade itself. A. Has cusps if not broken off B. Example of double cusps (rare) C. Baby Sand Tiger
Great White Sharks Tooth
Great White often referred to as a "GW" or "G-Dub" if you're super cool (haha) These have no burlette, but DO HAVE serrations, very rare find in Midwest Florida. A. Upper Great White Example B. Lower Great White Example