It was doing was sharks do naturally, hunting for food, and it cleared the beach in Eastham. 
 
 
 
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 Beach visitors and lifeguards at Nauset Light Beach spotted the shark after it took a bite out of a seal Wednesday afternoon. 
 
 Lifeguards immediately reacted. 
 
 
 
 "One of the other lifeguards gave me the signal for a shark, at which point I scanned back and saw an explosion of water and blood," said Chris Randall , a senior lifeguard. "The blood was the seal getting snatched by the shark. 
 
 
 
 "We cleared the water as fast as possible, we gave the word to the other beaches. The shark was heading north toward Marconi Beach." 
 
 "The beach was then closed for a period of at least one hour and the purple flag was flown at that time meaning there's dangerous marine life in the area," said Ryan Petersen, a South District ranger for the National Park Service, which runs the beach." 
 
 Petersen said swimmers are advised to stay away from seals and note the time of day. "Don't swim at dawn and dusk, stay in large groups if possible, don't go out too deep. Sharks are more prevalent near sandbars." 
 
 The Massachusetts Division of Marine Life Fisheries announced last month 68 great white sharks were swimming off the coast of Massachusetts during the summer of 2014. 
 
 
 
 The shark spotted Wednesday in Eastham was not a great white, but it still caused some concern. 
 
 "All of a sudden the lifeguards were like (yelling) get out of the water get out of the water," said Shelby Carney, who was swimming at the beach. "We didn't see the fin of the shark, but we saw the seals booking it the opposite way. All the other seals were gone." 
 
 
 
 "It was pretty gruesome," said young Tommy Berry, who saw the seal after it was attacked by the shark. 
 
 
 
 Tommy was back at the beach but won't be swimming, saying the appearance of the shark makes him a little nervous. 
 
 
 
 His older brother Matt Berry said, "it was almost like Jaws,'" referring to the 1975 movie about a huge great white shark that devoured people. 
 
 
 
 He estimated this real-life shark was 10 or 20 yards offshore. 
 
 Meredith Moise said she visits this beach for a week every summer. "I's very rare for something like that to happen so I don't think we have anything to worry about," she said. 

 Two Cape Cod beaches closed early on Wednesday when visitors spotted a great white shark in the water biting a seal and spitting it back out onto the beach, officials said. 
 
 Nauset Light Beach and Coast Guard Beach, just over a mile away from one another, each closed at about 4 p.m. Wednesday and remained closed through 5:15 p.m., when its lifeguards are off-duty for the night, said Leslie Reynolds, chief ranger at Cape Cod National Seashore. 
 
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 Beachgoers at Nauset Light saw a shark bite into a seal, resulting in a pool of blood. Minutes later, the seal was thrown out of the water onto the beach, where it died. Though no sharks were sighted at Coast Guard beach, lifeguards closed the waters because of its proximity to Nauset Light. 
 
 The one-hour swimming suspension following a shark sighting is a standard precaution, Reynolds said. When a person is injured by a shark, swimmers are kept out of the water for longer periods of time. 
 
 To stay safe, Reynolds said swimmers should swim close to shore, keep their feet on the ground, and stay away from seals, which sharks love to eat. 
 
 “When people go in the water, they really have to be aware of their surroundings, and make sure that if something goes wrong, we can get to them,” she said. 

 EASTHAM, Mass. (MyFoxBoston.com) -- An Eastham beach was closed after a shark was seen eating a seal. 
 
 The Nauset Light Beach was re-opened Thursday after being closed for a short time Wednesday due to a scare. The state's leading shark expert says, he's not surprised by the close encounters. 
 
 Even though sharks are looking for seals, not people, sometimes a seal will lead a shark closer to shore than some families are comfortable with, says the state's shark guru, Dr. Greg Skomal. And that's exactly what happened Wednesday afternoon in Eastham, where the Cape Cod National Seashore says a lifeguard spotted a shark attacking a seal and they called everyone out of the water for an hour. 
 
 "I can almost guarantee it was a white shark," Skomal said. 
 
 There were no other shark sightings at Nauset Light Beach Thursday, but beachgoers are being a little more cautious on the ocean side of the Cape. 
 
 Another family was walking along Nauset Beach in Orleans Thursday when they say they spotted a dead seal, raising a red flag for them. Others aren't as concerned, like John Goggins of Worcester who has been going to Nauset Light for 40 years and has no plans to keep his family out of the water. 
 
 "I think the kids are close enough to shore that they're not going to get attacked," he said. 
 
 Skomol says right now we're on track for a record breaking year of shark sightings. He says it was a slow start because of the cooler spring, but he says once the water started heating up so did shark season.
– Alarmed beach-goers watched a nature documentary play out in front of their eyes on Cape Cod this week when a shark bit into a seal and spit it onto Nauset Light Beach, the Boston Globe reports. The attack, which one lifeguard described as "an explosion of blood and water," created a pool of blood just off the beach, according to WCVB. The seal didn't survive. "It was pretty gruesome," says one young swimmer, who wasn't sure he'd be getting back in the water anytime soon. Both Nauset Light and Coast Guard Beach, which is a mile down the coast, closed early after the sighting on Wednesday but have since reopened. While there has been disagreement over whether the shark was a great white, one of the state's leading shark experts tells MyFoxBoston he could pretty much guarantee it was. Massachusetts is on track for a record-breaking year of shark sightings, he adds. According to WCVB, nearly 70 great white sharks were known to be swimming off the state's coast in 2014. Swimmers are being advised to stay in shallow water, avoid swimming at dawn or dusk, keep in large groups, and stay way from tasty seals.