My six line wrasse since i got him always goes up to the glass and sorta twists his body back and fourth. I dont know if he or she is checking themselves out or what. But i found this video on youtube of another six line wrasse doing the same exact thing. http://www.youtube.com/watch?feature=fvwp&NR=1&v=zlRb0fyZbAo does anybody know what it means/ what there doing?