Clown in my nano brething hard!

So I have had this nano set up for about 3 months
i have 2 baby clowns in there, about 1" in size, very tiny.. well one of them about 1" and one of them about 1.25" both of them are getting along VERY well.. both of them are hosting in my open brain coral and they love it.. been doing fine with that brain coral for about 2 weeks.. and last night i checked.. the female was breathing HEAVILY.. and at first, i thought it was because it was sleeping (how clowns have weird behaviors sometimes), but i checked back again and a few hours and this morning, and it is still breathing like that.. could it be the open brain coral did some damage to resist the clown and has injured the clown? any ideas on how i can save this clown?
nothing wrong with the body of the clown at ALL.. and it was even eating yesterday.. eats EVERYTHING.. that's why i'm shocked to see something like this.. any ideas? sorry about the grammar as i am just rushing to get this across to you guys

 

not to mention, it looks like the clown is fighthing something and is darting around aimlessly once every 30 mins or so.. it is laying on its side and breathing heavily...

 

clown was PERFECTLY healthy btw.. nice and fat.. no diseases, no ich, nothing

 

Did you do anything to the tank: i.e. water change, put your hands in to remove algae, etc.

 

water change close to a week ago, nothing bad happened after water change..
no i did not stick my hand in to remove algae but every time that i stick my hand in any of my tanks.. i always make sure my hands are CLEAN

 

Something might have stressed it out. I had that happen to one of my clowns a while ago. Is there anything else in there with them, fish wise? Or possibly the other clown has started to pick on it. You can't see anything visibly wrong such as ich or an external parasite?

 

nope nothing was wrong with the fish at all.. it's gone.. RIP..

 

Sorry you lost him. :-(

 

really confuses me.. i know when my fish are sick but this little bugger was REALLY healthy and all of a sudden, BAM.. it was almost like a human heart attack or something.. so sudden

 

I don't know what to tell you. Maybe she had something wrong going on on the inside that she was fighting okay but then it just took over...who knows....I'm really sorry!! It sucks.