The Bigtooth river ray is found only in Brazil’s Tocantins and Araguaia rivers. Assigned the number P12, this ray grows large, meaning it demands a huge system. The body is either dark brown or black with orange or white spots on the dorsal surface, and spots or blotches on the underside.
This is a hardy ray, but very rare in the trade; their import from the wild is restricted and the availability of captive-bred specimens is low. A variant – the so-called ‘King henlei’ – sports small spots surrounding the larger ones, making a vaguely crown-shaped pattern. These individuals fetch very high prices. Pronunciation: Poe-tam-oh-try-gone hen-lee-eye Size: Up to 100cm long Origin: Tocantins River basin Habitat: Sandy and muddy rivers and pools Tank size: 600x200cm footprint Water requirements: Very soft and acidic to neutral; 5.8 to 7.2 ph, hardness 4-16°H Temperature: 23-28°C Temperament: Predatory, peaceful with larger fish Feeding: Large meaty foods, fish pieces, prawn, earthworm Availability and cost: Best of luck! From £400 to £1,000