Ok i'm gunna try to make this as short as possible. 2 days ago my G/F was feeding my aro, cuz she was bored and was feeding him market shrimps. After the second one he ate he looked like he was choking (as she discribed it) and he sank to the bottom of the tank and just sat there for about 10 minutes she knew this was not right and used the net to pick him off the bottom and he started to swim normally. Now he is acting very skidish, he will no longer eat from my hand, and he started to jump against the lid something he never did before and caused 2 very bad scratches on his head and left side. What should i do does he sounds stressed out? should i add in a stress coat to calm him down and help heal the scratches or should i just leave him alone for a few days and see what he does. He's about 11 inches long right now and is in a 75g tank. Any input would be appriciated.