Columbian angelfish (Pterophyllum scalare)

As a student in Turkey I was every time taken aback when I read in aquarium books and magazines that angelfish (Pterophyllum scalare) was one of the most popular aquarium fish. All the selective-bred angelfish races I saw in aquarium shops like the smoke angelfish, white sailfins, triple colors and so on, looked so sluggish, [...]

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