ok so I have 5 gold barbs in my 20 gallon, and I got 3 cories a week ago and I've had them in quarantine now for a week, well I introduced them to their new tank about 2 minutes ago, well the second they came into the tank all 5 barbs came together and surrounded them at were just staring at them, when the cories swam, the barbs followed just staring at them like "what are you doing in my house?" it was the funniest thing I've ever seen, wish I could have taken a picture (would have but no digi cam), just thought I'd share