What Are My Barbs Up To? (video)

It was a little blurry but my guess is this is two males interacting with each other for dominance (competing for females, creating a pecking order in the school, etc.). My two male ruby barbs have been doing it regularly for about three years with no real damage that I have seen. It doesn't look too serious to me - if one was really being picked on it would probably be hiding.
 
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