Pomacanthus semicirculatus was created in 1831.

Pomacanthus xanthometopon was created in 1853.

No it is not, as you can see, the queen angelfish is much more colourful. The angelfish is just black and white. Except for the male, it is colourful but not as colourful as the queen angelfish.

The most common scientific name for the angler fish is Lophius Piscatorius. Another angler fish is the Black Devil and its' scientific name is Melanocetus johnsoni. One more is the Sargassum angler fish and its' scientific name is Histro Histro. The last one I will put here is the Painted Angler fish and its' scientific name is Antennarius pictus.

Thanks Google.com