You don't have to believe me if you don't want to, but thats what he is. He's about 5 or 6 years old, and I didn't own the parents, so theres no way I can give you the proof you want. I'm just saying that in my own experience Heros hybridize quite readily. I have been considering getting him a little harem of severum females to see if he's fertile, If i end up doing that I'll send you the pictures you need.
I think it is also important to note that genera aren't specifially a classification of genetic similarity between animals in many cases, and are constantly in flux. This being said, it isn't the scientific classification that creates the rules of the natural world, rather it is the best guess we have all agreed on so far as to what the rules probably are. So even if you've read that this isn't possible, it doesn't nesicarially mean that it isn't. It just means that no-one has ever heard of it happening before.
I also wasn't saying that the teeth thing was a result of the severum blood. I was just making an observation. Sorry I don't have better pictures, but his body shape is very similar to severum, he also has no nuchal hump for an adult male which is typical of a sev.
To further my point, stranger hybrids have happened. Look up in the knife-fish catalogue of segrest farms (segrestfarms.com), and you'll find a picture of what they describe as
Apteronotus albifrons (BGK) X Mormyrus rume proboscirostris (bottlenose momyrid).
By all logic this should not be possible, as the two fish aren't even the same kind, or in the same family, or even from the same continent. I suspect that hormone injection was involved, but it just goes to show, that stranger things have happened.
So all i'm saying is you don't have to believe me if you don't want to, but don't be so quick to judge. Just because something hasn't happened for you or you have never heard of it happening, it doesn't mean that it isn't possible. This guy only happened because convicts try to get with everything, it makes sense to me and seems totally plausable. It happened by accident in someone's show tank. I'll try to get some more pictures showing the severum body shape, but I don't have a digital camera so I cant promise anything. Has anyone here heard of other heros hybrids?