cloud mountain minnow fins

[SC Fish]

Gold white cloud mountain minnow , white cloud mountain minnow and 1 black mountain minnow , most of these show their dorsal and lower fins (not sure what they are called) they manage to show them most days , I'm wondering why they show them to the other fish ? 

some sort of aggression? maybe a dominance thing? i have 2 that keep them out at all times

[Colu]

It more than likely displaying for the females or other males in the tank

[nabokovfan87]

What does the black mountain minnow look like?

[SC Fish]

@Colu i belive they are all males. but i may be mistaken, possibly showing off to the female platys? i doubt it tho

@nabokovfan87i cant take a photo of him as i dont have a phone on me but  he looks like this

Edited May 22, 2022 by SC Fish

[Brian]

Young males .  They will display just because.  Reflection, another male or female.  With correct water, temperature and food supply (and BTW, for white clouds- this isn’t hard) they are always ready to spawn.  So regardless of what  they see - they have that - Hey look at me Attitude.  And that also makes them great fish.   Always wanting to display and really not much aggression.  
Good Luck 

[Brian]

Oh and a side note-  their fry, amazing looking.  
when I started spawning white clouds I was already spawning neon tetras. If I didn’t know better I would have thought I mixed up the spawning mops.  The fry when they first developed color are incredible.