This river is also home to some pretty dangerous fishes. The very dangerous Ocellate River Stingray (Potamotrygon motoro) is there, so because of the limited insurance available on this ship, I've been asked to insist that you either fish from the shore or the boats. The poison in their spine can sting enough that you don't want to experience it, but there's usually an infection afterwards that occasionally kills.

There is only one somewhat dangerous Piranha (or pana as the locals call them) that I know of in the river. That is the Red-eye or White Piranha (Serrasalmus rhombeus), but it isn't one of the most dangerous, however........

The three kinds of fish which are feared most in this continent are the Piranha, the River Stingray, and the Candiru. Depending on their numbers in the river you're in, any of them could be at the top of the list for concern. Since the Piranha is only a single species which is somewhat aggressive, I would put it at the bottom. The ray is pretty common there, so I'd put it at the top of the list. In second place is a little one inch catfish which doesn't carry disease and wouldn't bite you for the world. This fish, the Candiru (Vandellia Cirrhosa, pic and info here) is rare in this river, but it parasitizes fish by swimming into their gill openings and feeding on the filaments in there. When a person is in the water, and they feel the need to relieve themselves, this fish can feel the flow of urine in the water and believe it is water coming out of a fish's gills. They drive themselves in head first and get stuck. Their fin spines only allow them to go further in (like a grass seed in your sock), and it takes surgery to get them out. For this reason, locals of the areas where they are common wrap something over their genitals and tie it in place with string or twine.

Seldom placed in the top three, the Electric Eel (Electrophorus electricus) also occurs in this river. Since an 8 foot eel can put out 500 volts, it can shock you into unconsciousness. That can be pretty dangerous if you happen to be in the water at the time. However, I'm not here to arrest those who go in the water....I'll leave it up to you (if you're willing to sign a disclaimer).