Danio Rerio - Difference M/f And Ready To Spawn?

[mackbell]

Hey everyone,
 
I just try to understand difference between male and female and when a female is ready to spawn.
 
Can you please have a look at the picture. I think that 1,2,4,5 are females and ready to spawn. And 3 is a male. Is that correct?

 
Many Thanks
Thorsten