The most poisonous creatures on the sea floor are box jellyfish, blue-ringed octopus, stone fish, puffer fish, and cone snails.

1. Box jellyfish

It is the most poisonous poison in the world. It can easily kill prey and can cause death in 30 seconds after being stung. This jellyfish also swims faster than many other jellyfish. The box jellyfish is almost transparent and has many tentacles covered with countless harpoon-shaped poisonous needles.

2. Blue-ringed octopus

Only 15 centimeters long and brightly colored, this small octopus can kill a person in one bite. The blue-ringed octopus that lives in the Pacific Ocean has beautiful blue links on its arms and legs. When it encounters danger, the dark rings on its body and claws will emit a dazzling blue light to send a warning signal to the other party. Its sharp mouth can penetrate a diver's wetsuit, and the poisonous ink it sprays is enough to kill an adult within minutes.

3. Stonefish

Stonefish is one of the most poisonous fish and is also a master of camouflage in the fish family. It can change color and shape to simulate stones, hence its name. . The stonefish, which has an unassuming appearance and is only about 30 centimeters long, hides on the seabed or under rocks, disguising itself as an inconspicuous stone. Even if you stand next to it, it remains motionless and cannot be noticed.

4. Pufferfish

Although it is called "pufferfish", it swims between the sea and rivers. As the second most poisonous vertebrate in the world, the toxins in puffer fish can range from suffocating to death, and there is currently no antidote to this toxin.

5. Cone snails

Cones snails are also nicknamed "cone snails". They mainly grow in tropical seas and generally live in warm seas. They are molluscs and can be found in coral reefs, Their beautiful figures can often be seen on the beach. The cone snail is a highly venomous sea creature. Its tip hides a small opening with fangs inside, from which it can emit venom that is enough to kill an adult.