The chreub is also known as the pymgy angel so is the flameback they both have a max size of 3"
overview The African Flameback Angelfish, also known as the African Pygmy Angelfish or Orangeback Angelfish, has striking contrasts of blue and orange-yellow colors.
overview The Pygmy Angelfish is also called the Cherubfish, Cherub Angelfish, or Atlantic Pygmy Angelfish. It is a brilliant sapphire-blue with orange highlights to the face.