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Multiple sharks were seen thrashing in Waimea Bay on Monday morning, causing lifeguards to post signs warning people to stay out of the water, the second time in five days.
On Monday lifeguards spotted the aggressive sharks roughly 5 yards from shore in water murky due to recent heavy rainfall. The sharks were likely feeding on dead animals, city Emergency Services Department spokeswoman Shayne Enright said.
She could not provide a number of how many sharks were seen, saying the water was too murky to tell.
The signs were to remain posted until the end of Monday, and lifeguards would reassess the situation this morning, she said.
On Thursday an aggressive 6- to 8-foot shark was seen feeding on fish about 30 yards offshore at Waimea Bay.
Lifeguards kept signs posted Thursday and Friday.
It is unusual to see sharks in Waimea Bay. The common species in Hawaii waters include the blacktip reef shark, the whitetip reef shark, small hammerheads and tiger sharks — the most dangerous of the bunch.
Great white sharks are rare, scientists say.