Blue Tetras

[The-Wolf]

I purchased these, labled as Colombian sky blue tetras
I have a feeling they could be Acrobrycon ipaniquianus
Peruvian Sapphire Blue tetras, but they are more than likely
Boehlkea fredcochui Cochus' Blue tetra.

As I have adult B.fredcochui I am able to compaire the two, but
my adults dont appear to have any white on the tailfin.
It could be that the white dissipates as they get older though
any ideas?

 

[Lateral Line]

They look like B. fredcochui to me. I recall them having white markings. Acrobrycon ipanquianus has a fairly obvious red adipose fin which I cannot see in the picture.

 

[The-Wolf]

thanks LL
there is definately no red on them at all
so they must be Cochus'