i also have a senegal that I believe has brain problems, or just a few fries short a happy meal you know? It has been seen twitching 2 times (once for a few days, the other time just a few times in one day. This sen though eats more than any of them, like uncomfortable to look at after bloated an lumpy, floaty and still looking for more, eating poop and whatever isn't too big. I think when mine was twitching and acting erratic it had eaten gravel and was not comfortable and working it out. This fish though always looks for food and generally doesn't fit in with the rest, hyperactive, chews algae discs, rocks.... never saw a sen like it. Anyways, could be a winky like mine but maybe to greater level. This sen has a good ending though, had it for a couple years and still the most active, and the only one who will go to the top for food and take it from your hand (glutton). (sorry to hear about the passing RIP) Has it always been like this? if not how long?