Tang & Bubbles

For about half a year, we've had a hard time getting a castle drawbridge bubbler to work in our tank properly when it finally tilted the right way. Now the drawbridge stays down, trapping the bubbles until the bubbles get big enough to lift the drawbridge, releasing the bubbles.

About a week ago, Lone Wolf came over and was checking out the tank when she exclaimed, "Is the Tang swimming through the bubbles?" I made a non-committal grunt when Bratworse replied, "Yes, it's been playing with the bubbles lately."

Curious, both Lone Wolf and I leaned in for a closer look.

"It's biting at the bubbles!" One of us cried out.

Not only that, but the tang was carrying bubbles in its mouth and releasing them a bit aways. When did the blue tang start exhibiting strange behavior? I thought and my thoughts were echoed by Bratworse: "Think the blue tang is playing or is it showing signs of being in a tank for too long?"

So, what do you think? Is the Blue Tang playing with the bubbles? Trying to kill the bubbles? Or just having a bubble fetish?