How do I know when my pair is sexually mature?

[NotReefsafe]

My female I've had for 2 years, the male only 8 months or so. The male does the shaking thing often. How old are clowns when they become sexually mature, is it different for the genders, and what signs do they show when they are mature?

Thanks!

 

[OrionN]

When they start to lay eggs.