Leopold's angelfish (Pterophyllum leopoldi) from the Rio Demini in Brazil. These angels are similar to the common wild-type silver angels, but don't grow quite as large. They have a rounded head and their fins are generally shorter. They can be quite quarrelsome among each other, so a fairly spacious aquarium with lots of plants and / or driftwood would be well advised so as to provide ample visual barriers and retreats.