The two male Empire Gudgeons usually have territorial displays in the early morning to mid-morning, the dispuations involving a large log ornament. I have always wanted to get a recording of this, but it would be difficult as this display occupies 1/3 of a 56 gallon column tank.
On July 23, 2011, the female is spawning, (at least I think they are spawning) attended to by the larger male. The smaller male would occasionally try a run at the female, only to be roundly rebuffed by the large one. I recorded 8 minutes worth, uploaded it to youtube, and then I recorded an almost 20 minute 1 gig stretch of this. Sadly, too large for youtube. Since it was confined to one small area of the tank, I managed to get some fairly decent footage of them. Plus I have the longer recording for myself.
Simply entitled it as I've always thought of it..
"The Empire Gudgeon Show"