The sea snake (Pelamis platurus), also known as the "green ring sea snake", "spotted sea snake", is a subfamily of the snake family Cobraidae, the sea snake's abdomen is yellow or olive-colored. The sea snake has a yellow or olive-colored abdomen. The tail is laterally flattened like a paddle, and the back of the trunk is also slightly laterally flattened. Similar to the cobra subfamily, they are venomous snakes with anterior fangs. Sea snakes live in warm-water oceans from the Persian Gulf, eastward to Japan, and in Australia, but they are absent from the Atlantic Ocean.

Sea snakes have natural predators, sea eagles and other carnivorous seabirds. Seabirds see sea snakes swimming on the surface of the sea, the speed from the air swoop down, pick up a far away. The ferocious sea serpent, but once it leaves the water, it almost lost the ability to attack.

Additionally, sharks, turtles, and moray eels that live in the ocean also eat sea snakes. If a sea snake reaches the deeper parts of the ocean, it also becomes food for whales.

Another natural enemy of sea snakes is human beings, and every year fishermen catch a large number of sea snakes from the sea, which is the most harmful to sea snakes. Fishermen can make sea snake stew and process dried sea snakes for sale. People have been commercially catching snakes on some islands, and currently 180,000 snakes are caught annually on Kato Island, and there is similar fishing in the Ryukyu Islands.

Besides these, a variety of fish in the sea are natural predators of young sea snakes, and they face a number of natural predators, and they also kill each other among their own kind.

Sea snakes are intensely venomous. Its venom is similar to that of land snakes and is a mixture of several proteins, containing mainly neurotoxins (about 52.3% of the crude venom), muscular toxins (about 32.2% of the crude venom) and various enzymes. They have a gentle temperament and seldom take the initiative to attack others, preferring to inhabit shallow waters around continental shelves and islands, and are rarely seen in open waters where the water depth exceeds 100 meters. Some of them like to move in the clear water around the coral reefs, while others prefer to stay in the muddy water on the sandy or muddy bottom.