EEs and BEs are born with big fins, the betta must have the EE gene for it to be a EE and even some bettas with the EE gene aren't EEs...Its not the same thing as DeT growing into HMs or HMs growing into OHMs, they have to be born with big fins inorder for them to have big fins... I hope that answered your question!
GIVING AWAY PLANTS? REAL OR FAKE, I'LL TAKE THEM
3 males: Mardi (OHM) - Mason (HMPKCTEE) - Maddux (HMPK)
1 female: Mercedes (Undecided again) Maybe VT or Delta