So let me start by saying that I know gravel shouldn't be in their tank. I didn't when we first got her, we actually didn't intend to have a bichir when we first set up the tank. But I learned that they can swallow it so it's dangerous, and I've been trying to remove it. We have it mixed in with the sand so it's been a slow going process trying to get it out, once my back starts to hurt I stop. So anyways, she's had this lump for over a week now. She's still eating like normal, but the lump doesn't seem to be going anywhere. She's gotten this before but it went away in a few days. I feed my upside down catfish shrimp pellets and they seem to be too hard for her to eat so I think that was what caused the lump before, she ate one and it took a few days to break down. I've included a video because I can't get a decent picture.