Herichthys aren't otherwise known as electric blue carpintis. Herichthys is a genus, that includes several species, including, but not limited to, H. carpintis. Clearly most of us posting here understand that - the problem is that in this aquatic hobby there are crosses between some of the species within this genus, LOTS of them floating around out there. So posting a pic of a juvie fish, that was sold as an electric blue *anything*, is going to leave the door wide open as to what that fishes exact genetics are.
If you want quality fish, avoid generic pet store names, buy fish listed by their proper Latin name, and purchase from reliable sources.