You’ll be surprised not to see the great white shark on the top of the rank because not only sharks are really dangerous for human beings.
Wels Catfish

Immense freshwater fish growing up to 5m and more than 150kg is opening this shortlist. Living in central and eastern European countries, they often threaten people while hunting on fish, frogs, and birds. No doubt, the size of this fish allows here to attack anyone it would like to.
Electric Ray

Electric ray seems to be the most well-known electric creature worldwide. They prefer warm waters of different oceans and seas. It’s not the only species as you could suppose but various there’s a wide diversity of electric rays with different power of electric shock up to 220 V. A stun gun of the rays are specialized electrogenic organs looking like kidneys. They are used for hunting and for defense. You’ll find these deadliest fishes hiding on the bottom with brown-colored skin allowing to resemble it.
Lion Fish

Indian and Pacific oceans are motherland for lionfish which is ready to fight with enemies via venomous spikes and pectoral fines. This fish is rarely becoming a victim of larger predators because it knows how to protect itself. People also shouldn’t come close to the beautiful underwater inhabitant as its spikes can cause sickness and problems with breathing. They have no problems with surviving, so their population is growing as their habitat nowadays including parts of Atlantic.
Electric Eel

Did you know that electric ray has a more dangerous brother? Meet an electric eel (better not meet) and his electric discharge may reach a point of 600V. It means a fatal heart attack for an adult human. Sounds creepy because the body of this fish inhabiting in Amazon and Orinoco rivers area is covered by 6000+ electrocytes, electric cells. Don’t worry, eels don’t hunt on people but you’d better avoid these deadliest fishes, anyway.
Piranha

Everybody knows that bloodthirsty piranhas live in rivers of South America. Bite of this freshwater fish is so strong that a piranha can easily bite off, for example, a wrist of a human. Piranhas usually eat everything they find under water and if they feel hungry, they can eat huge prey, even a human, and that makes them deadliest fishes. Locals and tourists suffer from these small predators from time to time.
Bull Shark

You know, not only great white sharks are dangerous among sharks living around the world. Bull shark also guarantees you a quite unpleasant meeting. You’ll define why it has named a bull shark if you look at its snout. These sharks are also outstanding with their ability to swim in freshwater. Their kidneys are adapted to trips in rivers and lakes, so don’t surprise if you find a shark in the nearest river. Attacking everything they see they don’t hesitate to hurt people. Official statistics reports of 121 known cases of attacks.
Great White Shark

This hero of many horror films is known as the largest predatory fish with up to 20ft length and weight of 2000kg. These frightening animals live in all warm world Oceans and their history of attacks on people starts in the XVI century. Since then we know about 403 official cases with 65 fatal ones. The truth is that they don’t consider a human as a high-level food, the prefer seals and sea lions much more. So, they rarely eat people but their 300-teeth bites may cause death certainly.
Stone Fish

Another one inhabitant of tropical waters has amazing color and shape with dozen venomous dorsal spikes. Thanks to its color, the fish is looking like elements of the ocean bottom so one can step on this dangerous creature and get health problems including breathing difficulties, paralysis, and diarrhea. This information is important for tourists swimming and diving in the habitat of this fish.
Puffer Fish

Pufferfish are included in the top of the most venomous vertebrates on the planet. Warm waters are home for this fish that counts up to 120 species. Their only weapon is tetrodotoxin thousand times more poisonous than well-known cyanide. It’s almost overall consists of this venom: eyes, internal organs, spines. If they face something threatening for them, they expand their body making spines more dangerous for opponents. And if the poison may kill an adult human in several minutes you should be careful if you know about the presence of these deadliest fishes. By the way, their venom has no antidote existing. However, their delicious meat is popular and expensive in the cuisine of Asian countries.