They're back! The white shark season in the waters of the Cape's coast is officially underway. At least three of the tagged predators have been detected back in these waters.

According to the Atlantic White Shark Conservancy Facebook page, their buoy receivers have picked up signals from sharks named Turbo, Sandy and Omar. The scientists have yet to make any visual sightings of the creatures from their boat, but expect that to happen soon.

The sharks are drawn to the waters off the Cape by the increasing seal population of the region. They have also been spotted closer to shore in recent years.

The conservancy has some safety tips for swimmers at the Cape Cod beaches:

-Never swim in an area where you see seals

-Stay close enough to the shore where your feet can touch the bottom.

-Don't wear or take anything shiny (like jewelry) in the water.

-Never swim alone at dusk or dawn.

Actual shark attacks on humans are rare, but they do happen.