Molly Fry Acting Weird

KrystaK

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I kept three fry from my store bought females last drop (I want some new genes so I figured why not - and obviously I kept the best looking ones lol)
Anyways They're about three weeks to a month old now and I feed twice a day, in the morning they get freeze dried blood worms and mid afternoon they get fish flakes.
This morning I noticed they're starting to swim backwards - but only when one of their siblings is behind them. SO in essence they are trying to hit their brother/sisters with their tails. Is this a dominance behavior? - just curious, I don't mind if it is, I've just never seen my adults do it and I don't want this odd hbbit to become normal in the tank when they're older - they look so funny/stupid doing it :p
 
My guppy fry do the same thing.
I think as you say, they're probably sorting out the pecking order
 

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