Tang Suddently swimming sideways?

[reefo420]

Hey so just suddenly just started swimming like this
it looks weird since she doesn't usually do it, all the fish have been in here for 6+ months after a lengthy quarantine with copper
everyone looks healthy and is eating well and no ich that i can see
any idea if this is normal?
she's shaking the sand and being aggressive there, trying to uncover all the sand, goes around the tank does it all over the tank

Attaching two videos
Thanks

 

[Jay Hemdal Verified Community Expert]

My first thought is that it is being aggressive to its reflection in the glass. The more it does that, the more sand gets pushed away and the more it sees its own reflection.

Is the fish still eating well?
There is a slight chance that it is doing this in order to scratch at flukes, but I think it is just being territorial....

One trick I've done is to put a small rock at each location where this tends to happen, to keep it from seeing the glass bottom.

Jay

 

[vetteguy53081]

Hey so just suddenly just started swimming like this
it looks weird since she doesn't usually do it, all the fish have been in here for 6+ months after a lengthy quarantine with copper
everyone looks healthy and is eating well and no ich that i can see
any idea if this is normal?
she's shaking the sand and being aggressive there, trying to uncover all the sand, goes around the tank does it all over the tank

Attaching two videos
Thanks

My Purple tang does this ro claim territory in center of tank and keeps fanning the sand to the bottom and everytime I place the sand back, it moves it. It also appears in video the wrasse especially is trying to fight the current which may be a little strong from power heads

 

[reefo420]

My Purple tang does this ro claim territory in center of tank and keeps fanning the sand to the bottom and everytime I place the sand back, it moves it. It also appears in video the wrasse especially is trying to fight the current which may be a little strong from power heads

that's exactly what it was she kept doing it for 2 days straight untill lights go off, she's fine now! thanks