In my opinion it is
the bull shark. There are many species of dangerous fish in all area's of the world.
piranha
If you mean salt-water then the Great White Shark, although it's a world wide species. If you mean fresh-water: Pikes, Gars, and Muskies although I haven't heard of them really bothering anybody. They are no where near as dangerous as the Pirannahs of South America.
Jellyfishes are known as most dangerous, if a jellyfish bites you then pour vinegar on the wound and call an ambulance
The most dangerous fish in the world is the great white shark. it has very sharp teeth to grind its food. It its so much and never gets stuffed.
No one is really sure which is the second most vicious animal. It all depends on the animal and it's attitude.
the most dangerous type of lava is sticky lava because slow moving acid lava is more vicious
the mongrel koi is the most dangerous goldfish in the world acually to phrase that better its the mongrel koi is the deadliest goldfish in the world well lol there you go mongrel koi is the most dangerous goldfish.
fish
fish in the artic lowlands are one of the most dangerous fish in the world. they originated form San Lorenzo Guatemala. They Hurt children and will hurt you!
The most dangerous war in the world is the Vietnam War.
Shakespeare's Hamlet quote had me shivering in fear, certainly.
the great white shark is the most dangerous shark in the world