Sorry for the bad link: Here it is again.
Here are a couple of my glass catfish hanging out together. These guys can't see too well in bright light, so when I feed them, I usually turn the hood lights off and leave the room lights on. With just room lights on, they swim around happily eating whatever I feed them; flakes, worms, daphnia, etc.
You can see a 2.8MB avi video file of them schooling here:
Glass Catfish Schooling under some floating DuckWeed & MicroSword
http://www.lehigh.edu/~ded2/aquarium/GlassCatfish.JPG