Thousands of beach-goers in Florida are being told to stay out of the water because of sharks.
At least seven people have been attacked by sharks along the state's east coast this week. None of the injuries is life-threatening.
A 16-year-old and a 12-year-old were bitten on the ankles while surfing separately Friday at New Smyrna Beach.
Four other shark attacks happened in the same area earlier in the week.
One man received a deep bite to his ankle and lower leg at another beach.
Experts say sharks are swimming north on their yearly migration, searching for fish along the coast.
They often mistake arms and legs for fish, especially if it's someone with their arms and legs hanging over the edges of a raft or surfboard.
© MMI The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed