- a South American freshwater fish, genus Pterophyllum, often kept in aquariums.
- angel shark.
- any of various small tropical marine percoid fishes of the genus Pomacanthus and related genera, which have a deep flattened brightly coloured body and brushlike teeth: family Chaetodontidae
- a South American cichlid, Pterophyllum scalare, of the Amazon region, having a compressed body and large dorsal and anal fins: a popular aquarium fish
- another name for angel shark
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