I have two oscar fish I thinking its a girl and a boy. My albino and orange fish has a big tummy right now with a transparent thing coming out of her belly. Both my oscar fish have become extremely aggresive with thier other tank mates. What do I do and how do I make sure this is not a false alarm or my fish is not sick
Please help me out...I'm freaking out!!

What does this transparent thing look like and how long has it been sticking out?, any change of a pic?

I have never bred oscars but they dont get big bellies before laying eggs.

How big is your tank and what fish are in it

Can you test your water for ammonia, nitrite, nitrate and Ph