1. Killer whales
Killer whales, up to 9 m long and blue-white in color, are very eye-catching, are carnivores, but generally only pose a threat to survivors under certain conditions, such as sometimes overturning the raft.
killer whale
2. Rays
Rays generally do not actively attack humans, but they are large, some up to 5-7 m in width and 1-2 t in weight. The long spines of the ray's tail contain a poisonous liquid, so don't try to get close to it in the water.
Rays
3. Squid
The scorpion, one of the most poisonous fish in the world, has poisonous glands under the spines of its fins. If stabbed by a near-scorpion with its fin spines, the venom enters the wound, causing severe inflammation, nerve paralysis and severe pain and allergic headaches.
Sturgeon
4. Stinging pufferfish
Most of the stingrays are brightly colored, and after being hit, their bodies will bulge into a ball, causing their volume to become larger, and from countless fine holes, they will extend stingers to the surroundings, and once a trace amount of venom is pierced into the human body, it will lead to death.
Stinging pufferfish
5. Sea snake
It is common in the nearby waters of Zhejiang, Fujian, Taiwan, Guangdong, Hainan Island and so on in China. Sea snakes are more venomous than venomous snakes on land, and being bitten by sea snakes can cause death.
Silver ring sea snake
sea snake
6. Jellyfish
(1) Monk hat jellyfish
Monk hat jellyfish is a bright blue floating sac full of gas, floating on the surface of the sea, shaped like a monk's hat, so it is called monk hat jellyfish. The monk's hat jellyfish is mainly distributed in subtropical waters, this floating sac is nearly 15 cm long, but its tentacles can extend up to 12 m away. Contact with its tentacles can cause skin ulceration, dizziness, nausea, vomiting, and even body aches, and in severe cases, delirium, shortness of breath, and finally death from shock.
Portuguese man-of-war
(2) Tank jellyfish
The tank jellyfish, also known as the sea wasp jellyfish, lives mainly in the northeast coastal waters of Australia, often floating in the shallow waters off the coast of Queensland, and is considered to be the most toxic creature in the world. When a person is touched by its tentacles, it can cause death within 30s. Adult tank jellyfish are the size of a football, mushroom-shaped, and nearly transparent.
Tank jellyfish
7. Blue ring octopus
The blue ring octopus is small and lives in the waters east of Australia, especially the Great Barrier Reef, with a pale grayish white body color, embellished with rainbow-colored ring markings, and is highly poisonous, and can deliver a fatal blow when trampled or touched. Therefore, be extremely careful with all octopuses near tropical reefs.
Blue ring octopus
8. Long spiny sea urchin
There are also many unnoticed seabed creatures that pose no less of a threat to humans than the aforementioned marine organisms, such as the sea urchin with long spines. There are some sea urchin spines in the long-spined sea urchin that are poisonous, such as poisonous sea urchins or ring-stinged sea urchins, etc. If people are accidentally stabbed, they will cause redness and swelling of the skin, unbearable pain, and even severe symptoms such as rapid heartbeat and spasms throughout the body.
Long spiny sea urchins
In addition, sharp corals and entangled seaweed can cause harm to people who fall into the water.
Reishi corals
Ivory tower corals
Colorful corals
Antler corals
Seaweed grasslands
Seaweed forest