Wild Green Discus

Looks how to spot one

Scales and fins

Discus fish have a strongly compressed, disc-shaped body with a rounded profile. Their base colour ranges from brownish to blue and green, with darker vertical bars and blotches of black, yellow and red. They have long, flowing dorsal and anal fins and a fan-shaped tail.2

Personality what they are like

Discus are generally peaceful and calm, often swimming in schools. They can become territorial during breeding, but are not aggressive towards other species. They are shy and appreciate hiding spots.32

Daily activity how busy a day looks

Discus are active swimmers and need a spacious tank, at least 120 cm long, with open swimming areas and some submerged wood or roots for shelter. They do best in groups of five or more.3

Grooming and care the hands-on bits

Discus require stable, warm, acidic water. Regular water changes and careful filtration are essential. They are sensitive to water quality and temperature fluctuations.12

Home where they are happiest

In the wild, discus live in slow-moving or still waters with submerged tree roots and leaf litter. In aquariums, provide a tank of at least 120 cm, with soft, acidic water (pH 5.0 to 7.7) and a temperature of 26 to 31°C. They are not venomous or protected, but may be illegal to keep in some regions, so check local laws.132

Food basics what goes in the bowl

In the wild, discus eat insect larvae, insects, planktonic invertebrates, and periphyton (the slime on surfaces). In captivity, they accept a varied diet of bloodworms, tubifex worms, mosquito larvae, and high-protein prepared foods.32

Company who they like around

Discus are social and should be kept in groups of five or more. They form breeding pairs and show strong parental care. They are peaceful with other fish but may become territorial when spawning.32

The story where it all began

The green discus is a colour variety of the species Symphysodon aequifasciatus, native to the Amazon. It differs from the plain brown discus by having more green and blue hues on the body, with darker vertical bars. It has been bred in captivity for many years, and many domestic strains exist, such as turquoise, blue diamond, and pigeon blood. The green discus is popular in the aquarium trade and is sometimes called the 'King of Aquarium Fishes'.12

Recognised by the official bits

ITIS

Recognised as a species under the name Symphysodon aequifasciata, with the common name 'green discus'.4

Popularity High demand among freshwater aquarium enthusiasts worldwide.2