Dog face puffer

Question
Our puffer was just introduced to our tank 3 days ago & was adapting fine and swimming around and very hardy and now it is resting on top of our flow pipes at the top of the tank and when we feed it eats great but then just sits on top of our coral, he really don't swim around to much and always has his rear fin curled to his body, do you think he is sick  

Answer
THEY ARE PRETTY SEDENTARY. THEY DON'T MOVE AROUND MUCH, UNLESS YOU SHOW THEM FOOD. THEY CURL THEIR TAIL NATURALLY. IF HE'S EATING HE'S PROBABLY FINE. START PLAYING WITH HIM USING HIS FAVORITE TREATS AND HE WILL BE MORE ACTIVE WHEN YOU COME AROUND THE TANK.