PALM BEACH, Fla. - Area beaches are open Monday after some were closed over the weekend because of shark sightings.
Shark swarming season is going on right now, which means the sharks are migrating. Thousands of sharks can swim close to shore and close to swimmers in the water.
Park rangers at John D. MacArthur Beach State Park in North Palm Beach say they are going to keep a close eye on the waters after having to close the park.
The National Wildlife Foundation says spinner and blacktip sharks are the ones currently migrating. The sharks can be around 5 feet long.
If there is a threat of sharks, life guards will fly purple flags at beaches, meaning dangerous marine life could be in the water.
If you see a double red flag flying, that means the beach is closed.
Last year, Florida had more shark attacks than any other place in the world, according to a report from the University of Florida.
The last time someone was killed in Florida by a shark was 2010 in Martin County.