Giant gourami

Osphronemus goramy

Thick-lipped adults lose their juvenile bars.

Adults are deep-bodied and grey-brown with thick lips. Juvenile bars fade; males often develop a forehead hump.

Adult length: About 45 cm (standard length, without the tail fin)
Water temperature: 20–30 °C
Lifespan: 20 years or more
pH: 6.5–8
Hardness: 5–25 dGH

Natural habitat: Inhabits swamps, large rivers and standing waters.

Care range: 20–30°C, pH 6.5–8.0, 5–25 dGH; efficient filtration and clean water.

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Appearance and identification

Males have more pointed dorsal and anal tips; the hump can enlarge with age. Keep surface access unobstructed for air breathing. Osphronemus laticlavius is a separate species with red adult fin margins, not a dyed strain of giant gourami.

Social behaviour and territory

Large companions are not automatically compatible; monitor pursuit, feeding and retreat space.

Compatibility limits

Small fish and plants may be eaten. Adults produce substantial waste and can become aggressive when cramped.

Space requirements

183 × 61 × 61 cm is an absolute lower limit for one adult; larger is preferred.

Aquarium environment

Adults may eat plants; leave turning room and surface access.

Diet and feeding

Provide varied suitable pellets, frozen foods and plant matter.

Sources