Angel fish are very colorful & they are one of the most awesome fish you can buy for your aquarium. Angel fish have a wide variety of diets. Angel fish need good water quality to be able to maintain good health in your aquarium , so that they will live longer and healthier lives. Angel fish need plenty of room to swim , if they do not have it they will break down from stress of being in captivity. Angel fish will thrive in this kind of environment.