Clownfish Sexing Questions

[JusJim]

Last year in April I added two small (probably less than 1") false percula's to my tank. One of those two died, and until now I hadn't replaced it.

The one that lived is maybe about 2" now....I've had it for about 10 months, so I'm assuming it's about a year old or a bit more.

I just added another false percula to the tank last night. The new one is about 1", and after about 30 minutes of fighting everything has been fine.

I even noticed a few times last night that they were "quivering" at each other. Not sure what that really means this early in the introduction of the two.

Now for the questions...

About what age is a fish when a store is selling them as 1" juvenilles?

Since the older fish has been alone in the tank for 10 months is it most likely a female already? Or if its maybe only a year old is it too young to be anything yet?

I'm assuming that if the larger (older) one is not yet a female it will most likely become one?

The smaller one that I just added....how old does it need to be before it will become (I assume) a male?

At what age will false perculas start breeding?

 

[Random Aquarist]

I think that at that age they're able to choose a gender. The older/bigger clown is probably a female already.

 

[JusJim]

Everything seems to be going fine so far...although I have another question...

As mentioned above the 2 clownfish fought for about 30 minutes, and haven't fought since. Even though there has been no fighting there also hasn't been much "friendliness" shown between the two.

The first night they did "quiver" at each other a bit, and after that there was no more fighting.

Every once in a while they'll swim around together, but for the most part they just kind of stay in their own space and do their own thing.

Is this normal, or should they be buddy-buddy already?

 

[slam308]

Hi all,
Tagging on to see what the answers are. Particularly the "how old are 1" fish" question (does it matter if it's captive bred or wild) and the "how soon to see dominance/submissive behaviors" question.
Thanks