The most dangerous fish in the world


The most venomous fish in the world, with spines that can deliver a lethal dose of toxin. Dangerous fish lurk on the seafloor, camouflaged as rocks. 

Box jellyfish 

A marine invertebrate, not technically a fish, but with a sting that can kill a human in minutes. Dangerous fish have long, trailing tentacles covered in venomous nematocysts. 


Contains tetrodotoxin, a potent neurotoxin that can paralyze and kill if ingested. Dangerous fish puff up with water when threatened, making them easily recognizable.


A freshwater predator with razor-sharp teeth and a ferocious feeding frenzy. Dangerous fish are known for attacking even crocodiles.

Moray eel 

These long, slender eels have powerful jaws and sharp teeth, and can deliver a nasty bite. Dangerous fish often hide in crevices and ambush prey. 


Beautiful but venomous, with long spines that can inject a painful toxin. Dangerous fish are invasive in many parts of the world. 


Piranha not always dangerous. Few species can bite hard. Sharp teeth can strip flesh. Dangerous fish have razor-sharp teeth that can strip flesh from bone. 


A small catfish that swims up the urethra of humans and other animals, causing excruciating pain. Dangerous fish are found in the Amazon River basin.