Pterodoras granulosus is one of the larger members of the Doradidae, capable of reaching 70 cm in large aquariums and living for over two decades. Its common name refers to the granular texture of its lateral scutes, which are less sharply spined than in many relatives but still provide substantial armored protection. It is a commercially important food fish in parts of Brazil and is also occasionally exported for the aquarium trade.
In the aquarium, Pterodoras granulosus requires very large accommodations — at minimum 600 litres — and robust filtration to maintain water quality appropriate for a fish of its size. It is primarily nocturnal and secretive when young but becomes bolder with age, particularly in spacious tanks with regular feeding routines. It is a confirmed omnivore that will consume fruits, seeds, invertebrates, and plant matter.
This species is peaceful toward large tankmates but will consume any fish or invertebrate small enough to swallow. It is best housed with similarly scaled companions such as large arowanas, bichirs, large cichlids, or other robust South American species. Longevity, eventual size, and large footprint requirements make it a serious commitment.
