He had some kind of weird attack this morning after I fed him breakfast. He just blanked out and floated downward, without moving his fins, like he had suddenly died. His chin hit the side of the tank and his tail was propped up in the gravel. He just stayed like that for about 5 seconds even though I tapped and called to him. I was so freaked out! I thought he was dead and then he just "woke up" and started swimming around like nothing was wrong. ??? All I can think is that this was some sort of absent seizure. Apparently fish can and do have epilepsy. Hopefully he won't drown if he has a seizure and doesn't come out of it fast enough. Maybe like people with epilepsy he can still live a relatively normal life. I didn't know what else to do for him so I did a water change. It always perks up my fish when they get a water change.