is this the sign of sexing & pairing...?

[auem]

i have a 2.5 inch GS maroon clown,which has been in my 180 g fowlr for 1 years(it just doubled in size in between)..i just wanted to experiment and introduced a 1 inch plain maroon in that tank...not surprisingly GS chased the small one when introduced...but after 24 hours,i saw it not heading towards the
small one even whenever the small poking out in open from hideout...but chased once it came near him/her...after 3 days, yesterday i saw the small one is very close to the big and even mildly headbutting it..and the big surprise was the bigger one was withdrawing...few hours ago i saw the small one came very close to the bigger's den and they are occasionally floating side by side...

should i consider :

1)the big gsm has become female?
2)it has accepted the small male as partner?
3)a mating in near future is very much possibility?

accordingly i want to shift them in a 15G tank,only inhibiting by the pair...
will it be sufficient for them for breeding...?

 

[2Addicted]

Yes the larger one is female. Keep an eye on them I'm not sure she has accepted him quite yet but they are definately on the right track. Breeding soon is a possibility there are different variables that will decide if and how soon they will breed like age, what your feeding, the atmosphere of your tank, and they usually will not breed if things in your tank are constantly changing. I'm not sure what 50l is in gallons but I would say if they are the only fish in the tank a 30 gallon would be the minimum size

 

[auem]

measured it properly...it is 60l or 15g...

 

[2Addicted]

That wont be big enough imo. Maroons are the largest species of clownfish.