Sea snakes are creatures living in the ocean. They belong to reptiles, snakes, cobras and sea snakes. Common sea snakes are similar in size to ordinary snakes, but they are longer than ordinary snakes. Their bodies are flat, and their tails look like oars when viewed from the side. Common sea snakes are black in appearance and color, which is similar to zebra's color. Of course, there are other species of sea snakes, which are different in color from ordinary sea snakes, but this one is not common. Although sea snakes live in seawater, they can't breathe in water, so they need to swim to the water regularly to take a breath, so as to ensure that they can breathe normally.

Sea snakes are poisonous. They belong to the cobra family and are more poisonous than cobra venom. The venom of sea snakes can be regarded as the strongest animal poison. The venom of sea snakes with hooked mouths is twice that of cobras, which is equivalent to 80 times the toxicity of sodium cyanide. Although sea snakes are more toxic, they are different from cobra venom. Both are neurotoxic, but they damage different human parts. The venom of sea snakes damages voluntary muscles, not nervous system.

Moreover, sea snakes bite without pain, and venom invasion after bite also has incubation period. If you are bitten by a sea snake, you will not have poisoning symptoms for 1-3 hours. When incubation period passes, the venom will spread. If the poisoning is too deep, the heart and kidneys will be damaged, and finally death will occur.