12-18-2007, 12:38 PM
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My tank is 55 gallon. I have a total of four goldfish and no live plants or other creatures.
The fish behaved Ok until I added the new one, which I didn't know the gender. I didn't know the gender of any of them, to be honest, but I noticed the behavior towards the new fish is different. The blackmoore and fantail started chasing the Oranda, shoving their face in the oranda's tail. The other one in the tank, a pearlscale doesn't seem interested, and it's minding its own business.
So, I was a little worried, because at first it seemed they were being aggressive towards the new one. But after reading online, it just fit the description of male chasing female bearing eggs. That's why I assumed the oranda was a female.