Melanospilus changing?

[AquaristicA]

Today i went to the lfs to pick up the pair og swallow angel I ordered, it turned out a male was only awailable at the time so i decided to go with only one. My question is, will the male change to a female? If so, how long is the process?
Anyway he is a really big and fat angel...

 

[philter4]

No, the sex change is only one way, though sometimes a non-dominant male will change to female color to avoid being picked on, but it is in color only-not functional.