Flag tail Prochilodus salinity tolerance

[Stratoquarius]

Does anybody know the tolerance of salinity for this fish?
They come from around the Amazon in Brasil and I was wondering if they are found in only fresh water or do they venture into low-medium end brackish water naturally?

Just curious and couldn't find any information about this on google.

 

[Bottomfeeder]

I've never heard of any Characins entering brackish water.

 

[Stratoquarius]

Yeah I didn't think so either, but I know they migrate long distances, it was a longshot but was just curious.