Swimming is one of the healthiest sports one can do but not in the open sea. Either do it near the beach or in the pool if you want to swim.

1. Chironex (Box Jellyfish)

Box jellyfish do not have sharp teeth, a large mouth, or a venomous bite, but they are among the most dangerous species in the ocean. Also known as a sea wasp, this creature is responsible for more human deaths on the Australian continent than sharks, saltwater otters, and eels.

2. Blue octopus

This creature packs a venomous punch no more than 8 inches long. The blue octopus eats small crabs and shrimp, but it also has a poison that kills humans. In fact, they have enough venom to kill about 30 people in a short period of time. Its poison is 10,000 times more powerful than cyanide.

3. Crocodile

What more can be said about how dangerous they really are. They can swallow humans instantly with their wide mouths!

4. Eel

This creature can be found in the Pacific and Indian oceans. These snakes have a maximum length of 4 to 5 feet while other species can reach 10 feet. They are not aggressive animals, but due to the level of toxicity of some types of poison, they are included in the list of the most dangerous creatures in the sea. They rarely attack humans, but be vigilant when they are around. Sea snakes also appear in our list of the top 10 most beautiful snakes in the world.

5. Fish stone

There is a strange-looking creature that, despite its size, is believed to be a poisonous fish. It has a scaly body that can hide among the rocks, which increases its danger. Their dorsal fins are so sharp they can pierce your shoes, so you better watch where you step.

6. Fire coral

Touching this creature is very problematic. Divers wear gloves to protect themselves from this type of creature. These creatures have invisible tentacles that can deliver a powerful bite that can result in mild burns to severe pain and is sometimes associated with vomiting and nausea. Be careful when exploring the deep blue sea or any coral reefs.

7. Great white sharks

This predator is constantly included in the list of endangered animals and is constantly and incorrectly considered the most dangerous animal in the world. Its nature is generally misunderstood, and its mission is not to attack humans in the water. They are prone to attacking humans when searching for food, which is a basic instinct.

8. Lionfish

Found in the eastern Atlantic and the Caribbean, the lionfish is among the most beautiful creatures in the oceans. They are members of the scorpionfish family. Although they do not have a fatal sting, they still deliver painful attacks with a powerful venom!

9. Stingrays

These creatures are passive and rarely attack humans. Most accidents involving stingrays occur when swimmers and divers accidentally step on them, causing the stingray to defend itself with its fingers. Although most “attacks” are not dangerous, some types of stingrays can be fatal. Better watch your step when you want to dive!

10. Tiger shark

The series “Jaws” showed how dangerous sharks really are. This huge creature, known as a sea lion, can reach 5 meters in length. They are nocturnal, solitary predators, and their diet includes prey that ranges from seals, crustaceans, fish, turtles, sea snakes, birds, and squids to smaller dolphins and sharks. So basically, they can eat humans too!