My emerald cory -female- is fully grown and just under 3 inch. Oh and my corys always get on with everyone but don't get goldfish.. They can try and eat corys, the corys horns get stuck in the goldfish's mouth. The cory drowns and then the goldfish can die if you don't take the cory out. My...
The same happened with my kissers, so I separated them about 2 months ago, taking the bigger one out of the tank for a few days when I put him back in they were best of friends and still are.