You need to post some good pictures of it's head and sides, there are normals that are banded just as much if not more than that one. Was it sold as an enchi, or what did the breeder call it? Pairing that produced it?

As for calling an enchi a dark morph, you would have to be looking at the worst possible enchi's ever, or not even looking at an enchi at all to think that...enchi is a wonderful pattern and highlighting brightening gene.