whoa, he's incredible, he looks like you got him off aquabid!!! You definitely don't see a butterfly salamander plakat everyday!! He has perfect coloration!!! Sounds like he might be a bit stressed, how did you acclimate him??? Holding his fins close to him means that he's clamping them up, so wach him very closely over the next couple of days. Usually it's just a sign of stress but it can sometimes mean that there's an underlying illness going on.
My Current bettas:
Sullivan- Orange rose tail halfmoon male
Daisy- Mustard Gas (black and yellow) veil tail female
Milton- Teal butterfly halfmoon male (mom's betta)
DFTBA to nerdfighters working to decrease world suck!