Dozens of people looking for seashells found something much bigger, and perhaps "greater," off of Florida's coast.

Around 49 guests with Hubbard's Marina in Madeira Beach went on a shelling excursion at around 11:15 a.m. Friday when they found a roughly 10-foot Great White shark 25-75 yards from the shoreline of Shell Key.

The shark was seen in the area for following large schools of tarpon fish as it was "displaying a calm but curious demeanor."

"Seeing a shark of this size and grace so close to the island is a 'stop-everything' moment for our guests," Captain Dylan Hubbard, Owner of Hubbard’s Marina, said in a statement. "We see incredible wildlife every day—from pods of dolphins to sea turtles—but to see an apex predator following the tarpon run is a powerful reminder of how healthy and diverse our local ecosystem is right now."

The shark remained in the area for about 15 minutes before heading south.

Hubbard's Marina says it will use footage it captured of the shark to help researchers and the public better understand the movements of these animals in coastal waters.

The marina is reminding the public that these animals are a natural part of the environment and typically pose no threat to beachgoers along the Pinellas County shoreline.