Heros severum

A native of the Amazon basin, the severum thrives in soft, acidic conditions. Relatively tranquil except during spawning, it is one of the least prolific species of Cichlid, with the female laying only a hundred or so eggs in a clutch. Size: 20 cm.

• Pterophyllum scalare
• Telescope-eyed goldfish
• Tetraodon palembangensis or T. biocellatus
• Nematobrycon palmeri
• Eutropiellus debauwi