Chaetodon miliaris- The Millet seed or lemon butterflyfish has a lemon-yellow body with tons of intricate black spots in vertical rows. These butterflyfish tend to be curious and outgoing in-home aquariums, but they do tend to pick at some corals so be very careful with invertebrate additions to the aquarium. Millet seed butterflies are incredibly abundant in Hawaiian waters and easily recognizable.