does anyone else experience their JD swiming upside down? I have caught mine (male 4months old) swimming on his back a few time in the past month. He usually does this around dinner time. Not sure if this is typical or i just have a one in a million JD. He is normally very aggresive and actually comes to the glass to see you around dinner. But lately it is as if he is doing tricks to get his food. Common or unusual?