Provided your tank is large enough (48"x18"x18" minimum) you could stock many of the larger Tetras, Dwarf cichlids, etc. The main things to remember are that Angel fish (Pterophyllum sp.) are a fairly large Amazonian fish needing heaps of room and lots of water changes and they will hunt and eat smaller fish.
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Tilapia are in the cichlid family along with such popular aquarium fish as the Oscar and the freshwater angelfish.
An angelfish (Pterophyllum) is a popular, freshwater, tropical aquarium fish.
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because fish are cannibals
Angelfish will likely pick and nip at fighting fish if put in the same aquarium.
No because angelfish needs oxygen filtered so only an aquarium can be used to own an angelfish.
My Angelfish love to eat ghost shrimp.
an aquarium or a fish tank
Angelfish are not dangerous to people. There are freshwater and saltwater angelfish. The freshwater angelfish grow to a size of a few inches, while the saltwater angelfish can grow up to 12-inches.
It will not matter. The only difference will be is that your fish will get bigger in the aquarium.
No, first of all they should not be in the same tank, and secondly, goldfish are egg laying fish so they do not get pregnant