These fish get to the size of a small saucer, so be prepared to give them plenty of space. They get to about 6 inches (15 cm) when fully grown and can get aggressive with other dwarf angelfish. A full grown angelfish with the right conditions and size of aquarium can reach as big as 8” to 10” tall and 6’ long. When these fish are fully grown their beauty shines as they swim about the aquarium. The common P. scalare angelfish has a body length of up to 6 inches (15 cm) and a height (including their fins) of 8 inches (20 cm). How big do angelfish get? They do not require large open swimming spaces and do best in aquariums planted heavily with reedy plants. Plantsare a must in an angelfish’s aquarium. Angelfish are a relatively hardy species of fish and can live for 5-10 years when provided with adequate care and excellent water conditions. Overall it usually has a yellow body with purple vertical stripes and purple or blue fins. How Big Do Freshwater Angelfish Get? Angelfish, Dwarf Dwarf Angels are among the most colorful and popular of marine angel fish species. Aquarium set up. Centropyge bispinosus Coral Beauty Angelfish Gets to about 4 inches (10 cm) and their colors can vary depending on where they were collected. Growing to about four inches in length, these mild tempered fish adapt well to captivity and are compatible with many other species. Altum angelfish (P. altum) can grow up to 7 inches (18 cm) long and 10-13 inches (25-33 cm) high. BUT if you get a large catfish (10 inches and over) it will terrorize your angelfish by nipping at the angelfishes fins and if big enough will eat it.