I was trying to move my Elemental Dragon to a more profitable habitat and I accidentally sold it! Is there any way to get it back?

Hi and Welcome to forum :)
yes . try to contact sp and explain what happened .ask for removing the selling cost and giving your dragon back . this is how to contact them
https://forums.socialpointgames.com/topic/7/how-to-contact-support-report-a-bug

Did you ever know that ur my hero!!

Thank you so much ! <3