Brasiliensis tail color

[Dave62]

Growing out some Brasiliensis fry that i received last summer. All are looking good but noticed one with dark tail fin color. Is that just a normal color variation?

 

[ryansmith83]

This is a form of nerve damage. Sometimes the fish recover from it but sometimes it is permanent.

 

[Dave62]

Thanks RyanSmith, this is interesting. I guess I’ll just watch and hope it goes away.

 

[..puSkar..]

Yup nerve damage.
Could stay or heal completely.