1. Sharks: Some shark species, such as the great white shark and tiger shark, may occasionally venture close to shore, particularly if they're following prey or seeking food.
2. Stingrays: Stingrays can sometimes be found in shallow waters near beaches. They can inflict painful injuries with their barbed tails if stepped on or disturbed.
3. Sea Snakes: Certain species of sea snakes have venomous bites and may come to shore in search of food or mates.
4. Jellyfish: Jellyfish, including species like the box jellyfish and Portuguese man o' war, can have potent stings that cause severe pain and, in rare cases, even be life-threatening.
5. Lionfish: Lionfish, known for their venomous spines, can be found in tropical and subtropical waters and may occasionally come close to shore.
6. Blue-Ringed Octopus: The blue-ringed octopus, commonly found in tide pools and coral reefs, possesses a venomous bite that can cause paralysis and respiratory failure.
7. Moray Eels: Moray eels, though usually not aggressive, can deliver painful bites if they feel threatened. They can be found in rocky or coral environments close to shore.
It's important to be aware of potential hazards and take necessary precautions when swimming or engaging in water-related activities in areas known to have these animals. Always follow local regulations and advisories, and avoid areas where dangerous animals are known to frequent.