When Good Damsels Go Bad (Film at 11)

ok.. seriously... it's a cute little yellow tail, too small to hurt me or
anything else in the tank, but it ATTACKED ME today! I had my hand in
pulling out bits of algae (with my two buckets of freshwater sitting handily
by of course). I had noticed yesterday while I was doing some other cleaning
in there that the crushed coral down in one front bottom corner looked like
it had been blown out, like it does sometimes when the pump slips and points
down at the bottom.. I swished it around real quick and covered up the
*hole*.. was in this morning pulling algae and noticed it was cleared out
again. Assuming it had happend when I was cleaning off the pump intake, I
swished the substrate around again and covered it up but while I was doing
it this time, the one damsel that hangs out down there headbutted my hand..
several times. And now it is in the process of moving the bits back out of
the corner.. by mouth, one piece at a time. Now my Oscars do this routinely
just to make a mess in their tank and **** me off.. but what is with this
damsel? It is the smaller of the two I have and the larger is looking rather
suspiciously fat.. I don't know anything about their breeding habits. I kind
of feel badly about covering up the spot beccause it had to have taken the
poor thing a long time to move all that stuff out! Do they ever breed
successfully in home aquariums? I can't imagine anything surviving in there
between the two clowns and the hermits and the bristle worms.. not sure if
the yellow tang would bother them or not. I am tempted to put them into the
10 gallon but I still worry about that tank being stable enough.

Teeb