The most dangerous fish in the world | Complete List - WeFish

The most dangerous fish in the world

Here is the list of the most dangerous fish in the world. Are you ready to find out what the real threats are in the water? The most feared species in the ocean that you should avoid crossing on a fishing trip, or can you catch the hunter?

Some of these species, even small, can be even more threatening and deadly than any other animal. Inside the unknown ocean, we can find fish clearly recognizable by a fearsome appearance or a voracious attitude.

The World’s Most Dangerous Fish: A Compilation

Spotfin lionfish

The body of the Lionfish is almost entirely poisonous. Its brown and white stripes, its long and striking pectoral fins, as well as its irritable demeanor seem to say: Do not touch!

The Lionfish expels its venom through its eighteen sharp dorsal fins, being a highly effective defense tool. This fish catches its prey by its camouflage capacity and its very fast reflexes. The Lionfish sting is extremely painful to humans and can cause nausea and respiratory problems, although it should not be fatal.

Spotfin lionfish WeFish
The Lionfish is one of the most dangerous in the world.


Also known as pufferfish, for its ability to swell with water when threatened. This is their method of defense against predators, due to their slow and clumsy swimming.

It contains poison in different parts of its body: in its skin, liver and entrails. This fish has a poisonous capacity to kill thirty people. It has tetrodotoxin, a substance 25 times more poisonous than cyanide. Therefore, this species is included among the most dangerous fish in the world.

Pufferfish WeFish
Fugu is highly coveted in Japanese cuisine.

Banded Sea Krait, it’s not a fish, but…

It is not a fish, but its case also deserves mention. It is the most poisonous snake on the planet. Although it is not an aggressive species, it can attack when it feels under threat. Its venom is ten times that of a cobra. It can be submerged for about half an hour without having to go to the surface to take in oxygen.

They can be found in the Indian Ocean and in the Pacific. Its bite can cause muscle pain, drowsiness, blurred vision and even respiratory arrest.

Dangerous ocean species
Although it is not a fish, we must include the most poisonous snake on the planet. One of the greatest dangers of water.

Stonefish, the ugliest of the most dangerous fish in the world?

It is also one of the ugliest fish in the world, but don’t be fooled by its appearance. As its name expresses well, this species is perfectly camouflaged among the rocks and is one of the most dangerous species in the marine world.

It is considered the most poisonous fish in the world. Its venom is about as powerful as that of a cobra and affects the nervous system of its victims. It has 13 spines that it displays when it feels threatened. In addition, its bite can cause loss of consciousness, and even cardiac arrest.

The most poisonous fish
Stonefish can camouflage themselves in the deep sea.

White Shark

Despite not being poisonous, this is the most dangerous fish on the planet. This type of shark has a powerful jaw made up of hundreds of teeth, sharp as knife blades. One of its signs of identity is its enormous size, it usually measures between five and six meters in length (reaching up to eight). Its diet consists, in addition to fish, of mammals such as the seal or sea lion. Although they are not usually aggressive with humans.

World's most dangerous fish WeFish
The white shark is one of the most dangerous fish in the world, although it does not usually attack humans.

Barracuda, the fastest of the most dangerous fish in the world

One of the most striking characteristics of this species is that they attack their prey with astonishing speed. It lives in all tropical seas, especially near islets or coral reefs.

A barracuda can reach great speeds in very short distances. In a burst of their powerful tail, they can accelerate from 0 to 90 kilometers per hour. In addition, we must emphasize that this fish is known as the tiger of the seas, both for its size (a large barracuda can measure 1.8 meters in length) and for its demonstrable aggressiveness towards humans.

The most dangerous fish on the planet Barracuda
The Great Barracuda is known for its aggressiveness and powerful attack.


This poisonous species lives in shallow waters, buried in the sand to hunt for food. It is one of the ugliest fish in the world, and it can even cause electric shocks. Also known as an astrologer fish. They measure between 18 to 30 centimeters. They have two long poisonous spines located on the pectoral fins.

The ugliest fish
Uranoscopidae can provide electric shocks.


The piranha is a carnivorous freshwater fish that lives mainly in rivers in South America. They measure between 15 and 25 centimeters in length, although specimens have been found that exceed 40 centimeters. They are traditionally known for their sharp teeth, as well as an insatiable appetite for meat. Although we have seen many scenes of piranhas in the cinema, it should be mentioned that they do not usually attack humans, however, they are very aggressive. In times when there is not much prey for piranhas, they can attack people, since it increases their aggressiveness.

Most dangerous fish in the world
When hungry, a piranha can cause mutilation of hands and feet.

Longnose Gar

It is a very old species. It is think it has preserved its primitive appearance and shape since the time of the dinosaurs. These animals can breathe in poorly oxygenated areas. They can measure up to three meters in length and weigh more than one hundred and fifty kilos. It is an aggressive predator that feeds on fish and crustaceans, which it catches with its long jaws equipped with very sharp teeth.

Longnose Gar WeFish
It is think this species has preserved its morphology since the time of the dinosaurs.

Tigerfish, the most dangerous fish in Africa

We close the list with the Goliath Tiger Fish, possibly the most terrifyingly spectacular freshwater fish in the world. It is the most dangerous fish in Africa. It can measure more than 1.8 meters in length and exceed 70 kilos in weight. Its robust and powerful physiognomy shows its enormous power as a predator. Its enormous mouth with large teeth sharp as knives is capable of destroying its prey. It is for all this that this fish is attributed numerous mutilations and fatal attacks on humans.

The Goliath Tigerfish is the most dangerous fish in Africa.

The most dangerous fish in the world: WeFish


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