Question Rainbow Fish Flaring

Rdrb

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Guys I have a pair of dwarf neon rainbow fish in my tank both are males I just saw some unsual flaring such that their fins and tails protuded like that of a male betta should I split them up
 

kallililly1973

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As long as they don't appear to be pineconing It sounds like it could be mating or breeding behavior. Pics?
 
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Rdrb

Rdrb

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Well they are males never did I keep them with females plus the it looks like it opens it mouth thenn its two fins on top and bottom are wide spread
 

kallililly1973

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If your positive they are all males then they could be establishing their pecking order. Wait for others to chime in with more knowledge on rainbows
 

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