Zebra Angel Fish The Zebra Angel fish, Pterophyllum scalare, is a great centrepiece for a tropical aquarium. Freshwater Zebra Angelfish can grow quite large, so larger aquarium is recommended to thrive. The brightness of an angelfish’s colouring depends on its mood and stress levels. When angelfish are stressed or asleep, they can appear pale, or duller in colour. Healthy, well-nourished angelfish living in ideal water conditions will display vibrant colours.Angelfish are popular among...