Butterfly swimming back and forth on glass

[alki]

My copperband will not stop swimming back and forth next to my glass. I dont know if this is good, but I think not. Looks like stress, but there is nothing in the tank to stress him out. I just added a kole tang and now the kole tang is swimming back and forth on the glass! Its copying him, but my copperband has been doing this for a long time way before I added the tang.

There might be some copepods, but the guys is acting crazy about it, He will swim around the rocks fine, but once he gets next to the glass he just goes fast back and forth and back and forth and back and........

Anyone have ideas, or is this ok?

Ohh and I have a 120 with TONS of hiding places and a ton of mature liverock.

 

[mcoomer]

My blue tang is doing this. I don't know for certain but I'm pretty sure that they're seeing their reflection and getting pissed at the "other fish". I know my tank was swimming up and down the glass and frequently shaking its body violently and extending its fins. I don't think he's going to back down.

Mike

 

[Tbremer]

tagging along

 

[alki]

Wow these posts really die fast in this new layout.