HI,
I have a large blue tang that has quite the personality. She loves to pick shells/anything up and swim around with it in her mouth and then drop it. she thinks it quite the game. But recently she has been picking things up and using them to scratch my aquarium glass
. I have seen her do it, she will pick up a shell or rock and swim at the glass and push the rock onto the glass as she does it, you can even hear it scraping sometimes. Needless to say my glass has quite some scratches on it. I have tried to remove anything she can pick up to use but she somehow finds more 
my question is, is this normal for a blue tang? is she just weird? and is this behaviour a sign of anything or is it just her having fun? she is my first blue tang so i dont know what is normal or not. Also if you have any fish doing similar odd things i would love to hear i think fish with personalities rule
I have a large blue tang that has quite the personality. She loves to pick shells/anything up and swim around with it in her mouth and then drop it. she thinks it quite the game. But recently she has been picking things up and using them to scratch my aquarium glass
my question is, is this normal for a blue tang? is she just weird? and is this behaviour a sign of anything or is it just her having fun? she is my first blue tang so i dont know what is normal or not. Also if you have any fish doing similar odd things i would love to hear i think fish with personalities rule