Breeding Behaviour?

Cazgar

Fish Gatherer
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Oct 10, 2011
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2 of my Oto's seem to be chasing one of the others up & down the tank, especially into the filter flow.
I know it's probably unlikely, but could this be some kind of breeding behaviour?
They've been doing it for the last hour or so
I did a 40% water change earlier today & gave my filter a clean as the flow seemed down
All my fish seem more active, but especially the Oto's
 

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