iridescent shark.. sick or dieing not sure.

[charlieweaver21]

So my shark i got 2 days ago and well i think might be sick. He was moving alot the first day but starting last night he goes to the same spot and lays on the bottem of the tank and even starts to like roll over on his side and just stays there. Is this normal. He look find like on the outside no signs of any sickness. Anyone know?

 

[Andrew McFadden]

I have a columbian shark that rolls a little to the side when laying on the bottom. But I'm not sure about yours.