We've had 4 Zebra Danios for 2 weeks now in a new tank & it looks like 3 males & a female. This morning they were not interested in the food at all (which is not like them as they actually take the flakes out of your fingers now) & the 3 males were chasing the poor female round the tank. She was trying to hide in the plants but would then dart out just in front of them - she doesn't look distressed or anything & it's as if she's inviting them to chase her. We got 3 Platy's this weekend but they don't seem to have affected anything so far. I was just wondering if this is normal behaviour. Thanks v much.