Well since fish bones are so small your stomach should be able to digest them with no problem. Maybe you ate bad fish and that's why your stomach hurts? But try taking some PeptoBismol**spell. That will help ease your pain.
Clown fish would be a nice addition....You don't have to have their sea anemone to survive to thrive to the fullest but that is also a nice addition as well but remember they are poisonous.