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This Simple Precaution Could Save You from a Shark Attack After the Largest Great White Ever Spotted Near Cape Cod

Officials on Cape Cod have confirmed the return of what may be the largest great white shark ever recorded—an estimated 20-foot behemoth nicknamed “Deep Blue”—sparking renewed warnings for beachgoers in this popular summer destination Reuters reports. As excitement grew online, marine experts urged swimmers to follow one crucial rule: avoid swimming alone, especially at dawn or dusk when sharks are most active.

@NOAASharks “A 20-foot great white near Cape Cod underscores the need for group swimming—never swim solo.” via X

Shark biologist Dr. Lisa Feldman of the Shark Research Institute told CNN that “the biggest factor in unprovoked attacks is isolation—lone swimmers are far more vulnerable than groups.” She recommends the “buddy system” as the most effective deterrent.

@SharkResearch “Statistically, sharks attack isolated targets. Swim in pairs or groups for added safety.” via X

The Massachusetts Division of Marine Fisheries posted advisories on its official site warning that “recent drone footage captured Deep Blue patrolling near shore,” and reiterated that “swimming alone in open water increases risk.” Lifeguards at Nauset Beach confirmed extra patrols after spotting the shark just 150 yards off the sand.

@NausetLifeguard “We’re doubling the number of rescue boards and urging swimmers to buddy up—no solo swims after these sightings.” via X

Local tourist Melissa Grant shared her concern on X: “Saw the alert this morning—definitely sticking with my sister in the water from now on! #SharkWatch” Her post echoes widespread beach chatter under the hashtag #SharkWatch.

@MelissaTrips “Can’t believe how close Deep Blue was—grateful for the beach alerts. Buddy swims only!” via X

According to a NOAA safety bulletin, “sharks generally avoid large groups of people,” making collective movement a natural deterrent. They also recommend avoiding bright swimwear and shiny jewelry, which can mimic fish scales, but stress that group swimming remains the primary safety measure.

@NOAASafety “Group swimming reduces individual risk. Bright colors and jewelry attract curious sharks—keep it simple.” via X

The International Shark Attack File notes that 71% of documented attacks occurred on solo swimmers or surfers. In contrast, incidents involving groups are significantly rarer, with most sharks opting to retreat when confronted with multiple splashers.

Beach manager Tony Russo told The Boston Globe that “we’ve installed buddy-system signs at all entry points—simply swim with someone else, and stay within designated areas under lifeguard watch.”

@BostonGlobe “Cape Cod beaches roll out new buddy-system signage after Deep Blue sighting.” via X

Tourist operator Cape Cod Charters, featured on their website, suspended solo kayaking rentals until further notice, urging adventurers to “opt for tandem kayaks or guided tours” as an extra precaution.

Oceanographer Dr. Mark Henderson of Woods Hole Oceanographic Institution explained that “sharks use stealth and surprise—groups reduce that element, confusing their targeting instincts.” He emphasized that pairing up “is the simplest way to replicate natural schooling behavior of prey fish.”

@WHOI_Ocean “Marine predators target lone prey. Mimicking schooling behavior via buddy swimming is key.” via X

Swim coaches at the Cape Cod Swim Academy are offering free “buddy drills” this weekend, teaching pair-based entry and exit techniques, as posted on their community board. Coach Elena Suarez told participants, “Practicing buddy checks could literally save your life.”

Medical experts remind swimmers to remain calm if a shark approaches: avoid sudden splashes, maintain eye contact, and slowly back away in unison with your partner. These tactics, combined with group presence, dramatically reduce attack likelihood, according to a Sports Medicine Journal review.

As Cape Cod braces for peak tourist season, local health departments are distributing pocket cards outlining the buddy rule and shark safety tips. These cards, accessible via QR codes at beach entrances, cover emergency contacts, basic first-aid for bites, and guidelines for maintaining visibility.

In light of Deep Blue’s return, it’s clear that one simple precaution—never swimming alone—remains the most effective way to enjoy coastal waters safely. By sticking together, beachgoers can minimize risk and keep the ocean experience thrilling rather than terrifying.

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