Hello, I have 2 Red Fin Prochilodus that I've had for about a year, they are still small under 4". My questions is if anyone has ever had them blowing bubbles on the surface of the water. I'll try to get a picture as soon as possible but just to give you guys an idea, it looks identical to when bettas make their nests. He has been doing fine, eating swimming, and doesn't look like he's struggling for air. He just casually goes up and blows some bubbles.