Can handle small groups
Fish Grouping: S-Cardinals
Ochrestriped Cardinal
Can live in small group
Fowleria Cardinal
Can handle a small group
Flame Cardinal
Best in mated pair, but not in a group.
Yellowstriped Cardinal
Longspine Cardinal
Pajama Cardinal
Should be kept in small schools
Banggai Cardinal
Should not be kept in large groups, small groups are fine.