I like that idea. I named him Eelie. He looks like an Eel, is he an Eel?. One time I saw a yellow fish actually swim through his cave. I would like them to get a few tiny little catfish. Not big Catfish, the ones that are like 1 inch long, they are usually white/pinkish or brownish grey. I had them in an aquarium when I was a kid. I also would like some tall floating green plants.