What is the most venomous sea animal?

There are many venomous creatures that live in the ocean, but the most venomous is the box jellyfish.

Box jellyfish are found primarily in the waters around Australia and Southeast Asia, and their venom is considered to be among the most deadly in the world. The tentacles of a box jellyfish can reach up to 10 feet in length and contain thousands of tiny, harpoon-like structures that can inject venom into their prey. The venom of the box jellyfish attacks the heart, nervous system, and skin cells, causing excruciating pain and in some cases, cardiac arrest and death.

If you are stung by a box jellyfish, it is important to seek medical attention immediately. You can help to reduce the pain of the sting by washing the affected area with vinegar, but do not use fresh water or rub the area, as this can cause more venom to be released into the body.