OK so Nosy Be is a locale color morph of the panther chameleon. In Madagascar the location you find the panther chameleon usually coinsides with what we call a "typical" color morph. In Nosy Be, a small island to the northwest of Madagascar is where you will find these blue color morph panther chameleons. But on the other side of Madagascar they are a completely different color. Thus you have color/locale morphs. Ambanja, Ambilobe, Nosy Be, Nosy Faly, Sambava, Tamatave are some of the more popular ones you'll find in the pet trade. The names come from the names of the nearest towns in which that color morph is found.