Another Danio question

[Lynz781]

I have just recently noticed a sort of faint red horizontal line across all three of my pearl danios anal fin. When i noticed it on one i thought it may have been injured, it looked kinda sore. But after looking at pics on web i've realised they have it too. Have my Danios just developed this or is it just that i have not noticed? I'm sure it wasn't there before!?!? In fact I'm certain it wasn't as red. One of the danios bellys looks reddish too, I'm worried.

 

[The-Wolf]

have you looked at pics of danio roseus?
when d.roseus become sexually mature they develope red bellies.
d roseus and d albolineatus are very simiilar to each other.

 

[Lynz781]

Aww thats good I'm glad, they must be happy then. Do both males and females get red bellys? or just the male? They have fairly put on the beef too.