Swimming in the river (with the dolphins!) is a very popular tourist attraction in the Amazon, actually. Just don't pee in the water![1] [1] https://en.wikiped

Swimming in the river (with the dolphins!) is a very popular tourist attraction in the Amazon, actually. Just don't pee in the water![1] [1] https://en.wikipedia.org/wiki/Candiru_(fish)#Modern_cases https://en.wikipedia.org/wiki/Candiru_(fish)#Modern_cases