I bought 2 yellow labs from my local pet store on sunday and one of them from monday morning has been laying on the bottom of the tank on its side motionless it has had the occasional swim, but today all it has done is lay there behind rocks and not moved! The other fish is fine but this one seems to be not well in some way. Please can somone tell me what is wrong with the fish and is it goin to die if they can?? Could it be just from the move?? I have a pic to show you what the fish lays like. Sorry bout the bad quality

