hey guys i bought 8 firefishes about 3days ago and they were all out on the first day but now only 4 of them have been coming out. i checked behind my tank and on the floor and didnt find any bodies so im guessing that the other four didnt jump out. are the firefish killing each other off? i didnt see any aggression between them at the fish store but there were like 15 of them inside a little cubicle tank. is it possible that they weren't showing aggression because there was no territory for them to claim? im thinking of getting like 3 more but i wont if i know that they are killing each other off or something. any suggestions? should i get some more or should i not even try and push my luck? thanks guys.