by dahlberg » Fri Jun 17, 2011 3:48 pm
The orinoco is a big, big, big, big river. It's mouth is 250 miles wide! In other words, your question covers lots of territory.
There are big cats for sure, but I don't know about piraracu. The the areas I fished in the upper river were pretty fast, but I would imagine that if you can find sections with very little vertical drop and that have lagoons for them to spawn in, you could run into them.
Guyana has them, but as of now I believe they are protected.
good luck, safe travels!
best,
L
Larry Dahlberg
The Hunt For Big Fish