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Is this a rainbow fish?

Subject: Is this a rainbow fish?
by MattToner on 2017/2/25 19:20:41

Got this with my first tank around 6 months ago, but s/he was really 'gray' in colour.
since moving to my new 180L tank and started feeding them frozen blood worms, his/her colours are now beautiful, but im not sure what fish s/he is.
i *think* s/he is a rainbow fish, can anyone confirm or let me know what s/he is?

also, if possible, what sex too :)