Uaru cichlid
Uaru amphiacanthoides
Care at a glance
- Temperature
- 81–86°F (27–30°C)
- pH
- 6.0–7.5
- Adult size
- 11.8 in (30 cm)
- Minimum tank
- 65 gal (245 L)
- Temperament
- Peaceful
- Social behavior
- Social
- Swim level
- Middle
- Difficulty
- Difficult
- Breeding
- Hard
- Rarity
- Very rare
- Origin
- Brazil, Guyana
- Family
- Cichlidae
Overview
The uaru is a large, peaceful cichlid that lives in groups and is happiest kept in a shoal of five or more of its own kind rather than singly or as a lone pair. It is gentle for its size and mixes well with other calm, larger fish such as severums, discus and peaceful catfish, though small fish may be eaten simply because of its size. It is a shy fish that settles better in a group, with tall driftwood and roots to hide among and shaded, quiet surroundings. It is largely herbivorous, so feed a vegetable-rich diet of quality pellets, blanched greens and some frozen foods, and be prepared for it to nibble soft plants. Provide clean, warm, soft water and a tank of at least 245 liters, with much more room for a full group of adults.
In the wild
The uaru comes from the Amazon and Rio Negro drainages of Brazil and Guyana, living among submerged wood and roots in warm, soft, acidic blackwater. It needs real warmth, so keep the tank at 27 to 30 C with a pH of 6.0 to 7.5 in soft water stained by tannins. Recreate its home with tall driftwood, tangled roots and leaf litter, subdued lighting and a tea-colored tint. Because it grazes on soft plants, choose tough species or floating cover, and keep the water clean and well filtered, since this sensitive fish reacts badly to poor conditions.
Good to know
Uaru amphiacanthoides is a member of the cichlid family, Cichlidae, and grows to around 30 cm, with a tall, disc-shaped body and a large dark triangular patch on the flank that gives it the alternative name triangle cichlid. It is a substrate spawner that lays its eggs on wood or rock and guards them as a pair. In a striking parallel with discus, the newly hatched fry feed on a mucus secreted over the parents' skin during their first days. Breeding is difficult, needing soft, warm, clean water and a settled pair.
Did you know
Like discus, uaru parents feed their young on their own bodies. For the first days after hatching, the fry graze on a nutritious mucus secreted over the skin of both parents before they are able to take other food.
Where to buy
Some links may not be the exact species or variety.
- LiveAquaria Freshwater and saltwater fish, inverts and corals
- Imperial Tropicals Freshwater fish and inverts bred at a Florida hatchery
…or ask your local fish store.
Appears in
Keeping Uaru cichlid?
Track water tests, reminders and stocking fit.
Related species

Chocolate cichlid
Hypselecara temporalis11.8 in (30 cm)65 gal (245 L)77–86°F (25–30°C)
Green chromide
Etroplus suratensis11.8 in (30 cm)145 gal (550 L)68–86°F (20–30°C)
Blue dolphin cichlid
Cyrtocara moorii9.8 in (25 cm)66 gal (250 L)77–84°F (25–29°C)
Eartheater cichlid
Geophagus altifrons9.8 in (25 cm)115 gal (435 L)79–90°F (26–32°C)
Discus
Symphysodon aequifasciatus7.9 in (20 cm)65 gal (245 L)79–90°F (26–32°C)
Basketmouth cichlid
Caquetaia kraussii11.8 in (30 cm)79 gal (300 L)79–86°F (26–30°C)
