Clown behaviour

[oriarty]

Got my 2 clown fish 3 days ago and the smallest one is constantly swimming in place. Looks like it is swimming against the current. I’m worried about it’s health. Is everything fine?
Video

 

[oriarty]

Got my 2 clown fish 3 days ago and the smallest one is constantly swimming in place. Looks like it is swimming against the current. I’m worried about it’s health. Is everything fine?
Video

Also, it was swimming much more steady 1 inch from the sand.