Join Date: Jun 2010
Location: Jakarta, Indonesia
I did say ideal. Top and bottom fin and body should be equal. Caudal length must be equal to both dorsal and anal.
In reality, they seldom, if ever, reach that length. You need to constantly breed in-out to DT. IME dorsals are the hardest to create/maintain. They always return to regular size and form. Even if you line breed.
Bettaboy; if you are into shows, just study the requirements of each class (every country has it's own specific rule) and work towards it. Generally speaking, your boy could go either the symmetrical or asymmetrical route. Asymmetrical would be easier.
Don't forget to work on his color/pattern too. I don't know much about color/pattern requirements other than it has to show totally one color (solid) or balanced multiple colors. So I don't know how fancy or koi patterns would compete in shows.
Great job so far. Keep it up.