Altum Angelfish

Pterophyllum altum, known simply as the Altum Angelfish, is not commonly seen in the aquarium trade. It is larger, deeper, and flatter than the commonly seen Angelfish species, Pterophyllum scalare. Although they are far more sensitive to changes in water conditions, and therefore more challenging to keep, they are well worth the extra effort. Expect to pay a little extra for them as well, as they are far and few between in pet shops.