One my favorite freshwater fish is the angelfish. I've kept these semi-agressive fish for many years with no major problems. The fish is part of the cichlid family, who by nature can be territorial. They will also eat other fish that can fit in their mouths, so tank mates such as neon tetras won't last very long.
Angels should be kept in schools of 4-6 with plenty of room to swim. They generally prefer water a bit on the soft side with a slightly acidic PH (I keep my tank at 6- 6.5).
The great thing about angels is that there are so many strands and color varieties avaible in the hobby. Although most chain pet stores carry the basic colors, you can find more unique colors at speciality fish stores and at fish club auctions.
Here are some of the common varieties:
Gold angelfish have bodies that are a lustrous, light shade of yellow. The head of this beautiful variety of angelfish develops a brilliant shade of gold as it matures.
Silver angelfish have silver bodies, a tawny head, and black vertical markings. These markings can vary greatly. They can be dark, light, solid, or broken. Each Silver angelfish has its own unique pattern.
Koi angelfish (a picture of mine can be found on my homepage) are a stunning variety. These angelfish are white with patches of black and gold (resembling a koi fish).
Smoky angelfish are a unique variety. They are a beautiful shade of silver on their front half, and they are a dark gray or ebony on the back half. The distinct separation of color between the front and back looks almost as if it was painted on.
The marble colored angelfish are a mix of black with a white. Some strains almost appear to have more of a silver color then white.
Zebra angelfish have a black body with narrow stripes like that of a zebra. These striking fish are sometimes adorned with gold sparkles across the top. The details of this beautiful angelfish are simply amazing.