Hey guys,
Not trying to rain on the ceviche parade (I love ceviche) but you are taking a huge risk by making it out of a fresh water fish. Freshwater fish contain bacteria and parasites that are more prolific or possibly dangerous than saltwater fish.
Link"Tapeworms are far nastier. They live in lots and lots of freshwater fish, to the point that only the foolish would even think about eating a wild trout or largemouth bass raw."
LinkI would NEVER make ceviche with any kind of freshwater fish. There's a reason why you never see freshwater fish served as sashimi at sushi restaurants. I'm pretty sure "cooking" raw freshwater fish in lime or lemon juice does not kill the bacteria.
All I'm saying is be careful guys!! I wouldn't want to see anyone get unnecessarily sick!