I've been at this for about 1 1/2 years and have been very interested in the science side of the fish--so I can do it right. Well, I tried to cut corners and introduced a demasoni before it was acclimated and he went into shock. 
Very sad--this was my first of many fish (I trade a lot) to ever go into shock. I isolated him from the group and now he seems totally recovered. I have yet to see him eat, but I'm not worried about that--yet.
My question for the more experienced members is if there can be any permanent damage from being in shock--ether physically or behaviorally? He was very aggressive at the LFS and in the bag awaiting introduction to the tank and now he seems a lot more passive. Maybe he has not fully recovered after 2 days, but I need to know.
Thanks all. Lesson learned by me and hopefully can pass that along.

Very sad--this was my first of many fish (I trade a lot) to ever go into shock. I isolated him from the group and now he seems totally recovered. I have yet to see him eat, but I'm not worried about that--yet.
My question for the more experienced members is if there can be any permanent damage from being in shock--ether physically or behaviorally? He was very aggressive at the LFS and in the bag awaiting introduction to the tank and now he seems a lot more passive. Maybe he has not fully recovered after 2 days, but I need to know.
Thanks all. Lesson learned by me and hopefully can pass that along.