![]() Some, although not many, deaths have been reported.ĭangerous aspects: a drop of their venom can kill up to 20 human beings. But, one species, hydrophis platurus, has a stronger and more potent venom than any terrestrial snake in the world. Most are categorized as reluctant to bite. Some sea snakes can be safely handled, while others should be avoided. They breathe air, meaning they have to surface regularly. These snakes have compressed bodies and are often mistaken for eels. Sea snakes are venomous snakes that can be fully aquatic, meaning they cannot survive on land. Sea snakes have potent venom that can cause human death Less than one drop can kill a human being. Although these attacks are rare.ĭangerous aspects: highly toxic venom. Sometimes, barracuda mistake snorkelers for prey and attack human beings. Their pointed heads give them an underbite.īarracudas can travel up to 27 miles per hour, or 43 kilometers per hour when they attack prey. They have jaws of fanged teeth and a prominent, recognizable nose shape. They live around coral reefs near the surface of the ocean. They’re saltwater fish and can be found in tropical and subtropical waters. Barracudas are notoriously aggressive, with razor-sharp teethīarracudas are predatory fish that are notorious for their aggressive behavior. Their venom is rarely fatal, but there have been examples of extreme allergic reactions resulting in hospitalization and death.ĭangerous aspects: rows of razor-sharp teeth and toxins in the flesh. One might also experience diarrhea, heartburn, headache, and numbness. If stung, a human being will experience everything from extreme pain to vomiting, nausea, and difficulty breathing. Lionfish are great predators and are often a hazard to divers and fishermen. They have distinctive spiky fins that radiate out around their bodies. They are colorful, usually sporting red, white, and black bands. The lionfish is a beautiful venomous marine fish that’s also sometimes called a zebrafish or firefish. ![]() The Lionfish has venom on its spine that can kill In recent years, they’ve become more engaged and are usually listed as such by the IUCN.ĭangerous aspects: venom on their spines that causes incredible pain. There are a variety of species, around 220. Stingrays are common in tropical and subtropical waters around the world. They burrow under the sand of shallow waters and, if stepped on, may sting. Generally, stingrays aren’t dangerous, but they can be deadly if a swimmer is stung. The stingray can kill people with their poisonous barb Only sightings from reliable sources (Lifeguards, ATV operators, Nantucket Police, Nantucket Fire or sources deemed reliable by Marine Division Supervisors) will be considered verified and confirmed.Dangerous aspects: deadly sting that has been known to kill people. Only confirmed sightings warrant a closure of the beach to water activities. Contact Police dispatch once the closure has been terminated.Check availability of an aerial marine survey team to complete a flyover of the area.Keep the water clear for one hour if outside the safe swim zone and two hours if inside the zone.Proceed to adjacent unprotected beaches and advise the beachgoers and swimmers on those beaches.Clear the water on the protected beach and fly a double red flag.Advise Police Dispatch which direction the shark is heading how far off shore it is and approximate size if known. Once a sighting has been confirmed, the Lifeguards will: If the shark is outside the swimming area, the closure will be terminated one hour after the last observation. If a closure is initiated, the closure will be terminated two hours after the last observation of the shark if the shark is inside of the swimming area. If the shark is feeding, stalking or has otherwise peculiar behavior, a closure is indicated regardless of size. If the shark is less than 4 feet in length (sand shark or dogfish) there is no reason to get people out of the water. If a shark is sighted, lifeguards will take the following action for the safety of the people at the beach: Lifeguards are responsible to educate the beachgoer about safety to avoid encountering shark and other marine mammals. However, a shark’s dorsal fin cuts through the water in a straight line is constantly moving and normally a shark’s tail fin is exposed also.Įxperts say that people can avoid encounters with sharks by staying out of the water between dusk and dawn staying in groups whenever possible not swimming in sight of observed seals and not venturing too far from shore. Often times basking sun fish are observed and thought to be a shark by persons on the beach. It can be difficult to determine the species of the shark. Occasionally, sharks are observed from the shoreline of Nantucket beaches.
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