I think it would depend on the species. Some stay small and some get bigger. I think yours is a Mastacembelus tanganicae, which is one of the smaller types meaning a front would eat him. I have seen larger species like elipsifers kept with fronts and it seemed to work. It would be a rick though.
This is the most recent picture of my eel. He's slowed down growing and has started filling out. Most interesting fish I have ever owned.
Here's an older picture of when he was about 6" long
This is the most recent picture of my eel. He's slowed down growing and has started filling out. Most interesting fish I have ever owned.
Here's an older picture of when he was about 6" long