I bought a beautiful Sailfin tang. We added her to our tank and we noticed she wasn’t acting right. She kept hitting her nose on the rocks, glass - just about anything. I thought maybe she was stressed and would settle down. We waited a long while and started to watch her again. She has continued to hit the rocks, tank wall, heaters. Then we watched her run headfirst into our puffer - numerous times. I put the net down in the tank and it did not phase her (all my other fish scattered). I got her out and she is in the sump. So upset.