Fat Danio

[Hovoc]

One of my danio's belly is HUGE. I cant quite tell if its a female, they all move too fast for me to check. The breed is listed in my sig. PLease tell me how I can ID if its a male or female.

 

[dskidmore]

Is the swelling symetrical or lopsided?

 

[Hovoc]

looks symetrical

 

[dskidmore]

Could be pregnant.

Sexing Danios is not easy for humans, but the other Danios can tell. What has the behavior between the Danios been like?

 

[Hovoc]

earlier today, the other 3 were chasing the big one around

 

[BrianNY]

Actually I've found danios quite easy to sex. Females simply do get plump with eggs and are thicker than males. All that chasing is indicative of spawning. Your fat danio is more than likely an egg laden female.