I've been reading up on these eels a lot lately, as I really, really want one or two myself, and you want to be careful what kind you end up with if space is an issue. They all beong to a class known as spiney eels, and the peacock eel is one of the smaller varieties, growing to a max size of about 18". But Two other varieties, the tiretrack eel and fire eel grow nearly twice that size, which may be what you want... but maybe not. And an in-between eel is the zig-zag eel that gets to about 25". They all eat pretty much the same thing, like shrimp, bloodworms, earthworms or red wigglers, etc. They will also eat small fish if any are available, and they are mostly nocturnal, so don't be alarmed if you don't see them much during the day. A length of PVC tube makes a good cave for them to hang out in.