Fish Shaking its Head
 

One of my guppies has been behaving oddly. He pretty much stays in one area of the tank up near the top and stays by himself. He will shake his head back and forth and swim in circles. Anyone know what this means?

It doesn't sound like any type of symptom that i've ever heard of. Just keep a close eye on him for other signs of illness and then see if any one can help further.

I hope he's ok.