Venice, Florida, is famous for its sunny beaches and shark teeth, but just offshore lies a much deeper story about Earth’s past. A short distance from the coast, the seafloor is covered with fossilized teeth from sharks and rays that lived when Florida sat under warm, shallow tropical seas, rather than being dry land.
These layers of teeth transform the “Shark Tooth Capital of the World” into a kind of time capsule, revealing that this coastline once supported a rich ocean ecosystem teeming with various marine animals.
Instead of being just a tourist destination, Venice becomes a place where everyday sand and shells sit atop an ancient marine world that scientists are only now starting to understand in detail.
How Scientists Explore This “Lost World”
A paleontologist from Florida Gulf Coast University leads a research team that has spent years studying these fossils offshore from Venice. Using SCUBA gear, divers collect sediment from the shallow continental shelf in water about 3–12 meters deep, focusing on tiny teeth and bone fragments less than a centimeter long rather than the big teeth most beach hunters want.
These fossils come from the Peace River and Tamiami formations, which formed during the Miocene and Early Pliocene epochs, roughly 24 to 4 million years ago, when Florida was mostly covered by warm seas.
Sharks’ teeth built up in phosphate-rich mud on the seafloor. Over time, changes in sea level, waves, and storms exposed these layers, creating a “conveyor belt” that moves fossils toward the modern shoreline.
One important spot, called “The Boneyard,” is an ancient riverbed located about a mile offshore and approximately 30 feet deep. It concentrates larger teeth and bones, attracting both hobby divers and professional researchers who search there for rare finds.
What the Fossils Tell Us About Past and Future
In October 2025, Dr. Harry M. Maisch IV and colleagues published a peer-reviewed study describing at least 45 different species of sharks and rays from these offshore deposits, collected entirely by SCUBA diving.
The fossils include eight species that no longer exist anywhere on Earth, such as the giant Otodus megalodon, along with several species never before recorded in Florida. This makes it the most diverse fossil shark and ray assemblage ever reported from the state and one of the most diverse late Cenozoic assemblages in the United States.
Because each sediment sample can hold hundreds of tiny teeth, scientists can use them to reconstruct ancient sea levels, water temperatures, and food webs, gaining insight into how marine life responded to past climate shifts in the Gulf of Mexico.
Venice’s popularity as a fossil-hunting destination—including its annual Shark Tooth Festival and guided fossil dives—puts tourism and science in direct tension, because casual collectors legally enjoy searching for teeth, yet they risk erasing valuable data when they remove too many fossils from key sites before scientists can study them.
To balance these interests, universities and museums are working to study, preserve, and eventually display these fossils, allowing visitors to enjoy them while also learning how this “lost world” can help explain both Earth’s history and the environmental changes facing Florida today.