PlanetCatfish.com

I have a Pygmy Cory that doesn't seem to be doing so well. Its abdomen looks a bit discolored. Slightly pinkish/orange. The dorsal fin clamps down and the straightens up. On occasion it darts to the top of the tank and comes back down.

A Pygmy Cory died about 7 days ago, and now there are only 3 left. The other two don't show any sign of discoloration or erratic behavior.

Anyone have any idea what it might be?

All my pygmaeus nip up to surface every once in a while - this should be nothing to worry about.

The body discolouration could be a bacterial infection - a pic would help us be sure