"NetMax" wrote in
:

I could be mistaken, but I've never considered it desirable to shoal
the larger cyprinides SAEs , CAEs, Redtail sharks, Rainbow sharks etc,
as they can be territorial, and don't seem to suffer being alone.

All the other fish you listed are territorial when adult, but SAEs are
schoolers for all of their lives. Don't keep them alone. They are not as
peaceful as several tetras, but they are active and do some fighting with
their school mates (like many other barbs do). Still they like to have
company and can turn aggressive if there are no other SAEs in the tank.

Liisa