Ohhh that's interesting. I didn't know there was a difference since my lfs labeled them as both "agassizii tefe" so I assumed that tefe was just a color variant. Might sound ignorant, but I still can't see the zigzag lines that people talk about. Do you by any chance have pictures to show the difference? I might have to look at my fish again tomorrow to see if I can see it in person.All agassizii-complex species and forms are "somewhat similar" However, your fish are A. sp. Tefe, a different species than A. agassizii, not just a colorform or population of them. You can distinguish A. sp. Tefe from all other agassizii-complex species by means on the zigzag stripes along the body.