Most people consider the Amazon to be the most dangerous. It is more than 150 feet deep. During a flood season, the Amazon widens to cover its banks and the islands in the middle of the river. The Amazon River is known for high tidal waves as well, and is home to bull sharks.
The Nile River
Minnesota
Columbia River Bar
Well obviously they will be some dangerous animals on the river...Because there are in most river's example in some Rivers there are Hippos, Crocodiles, Snakes but that wont necessarily be the case in this river.
ants
Hippopotamus
Columbia
I think the answer is Amazon River. In India, it is Brahmaputra River.
The amazon river can be dangerous because it is deep in most places, and even amazon river creeks can get up to 6 ft deep. There are also many dangerous animals like piranhas, electric eels, alligators, caimans, and anacondas that can attack swimming people.
I'm not sure i wanted to ask this to
ANY river is dangerous, it doesn't matter what type or name it is.
Tennessee river