Can I keep two male Cockatoo Dwarf Cichlids together in the same tank?

It is highly discouraged unless the aquarium is exceptionally large (over 200 litres) with abundant visual barriers. In smaller tanks, the dominant male will relentlessly harass the subdominant male, often resulting in death.

Why has my female Cockatoo Cichlid suddenly turned bright yellow?

A brilliant yellow colouration with stark black markings on her front fins is the classic breeding dress of a female Apistogramma. It indicates she is either ready to spawn, currently guarding eggs, or actively raising fry.

Are Cockatoo Cichlids safe to keep with ornamental shrimp?

Adult Cockatoo Cichlids are highly effective micropredators and will actively hunt and consume small ornamental shrimp, such as Cherry Shrimp. Larger, heavily armoured shrimp like Amano Shrimp may survive, but are still at risk during moulting.

Do I need to keep them in a harem, or is a single pair okay?

While they naturally form harems in the wild (one male to multiple females), they can absolutely be kept as a single male-female pair in a smaller aquarium. A harem requires a larger tank (90+ litres) so each female can establish her own distinct territory.

Do they absolutely require a blackwater aquarium setup?

No, they do not. While they greatly appreciate the leaf litter and natural tannins of a blackwater environment, the Cockatoo Cichlid is naturally found in both clearwater and whitewater habitats, making them adaptable to standard, slightly acidic to neutral clear water.

FreshwaterTropicalIntermediate

Cockatoo Dwarf Cichlid

Apistogramma cacatuoides

The Cockatoo Dwarf Cichlid is a remarkably striking, characterful, and adaptable South American species famed for its extravagant, crest-like dorsal fin.

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Ideal Conditions

Temperature: 24 – 28 °C
pH range: 6 – 7.5
Hardness: 2 – 15 dGH
Adult size: 5 – 8 cm
minimum for a single pair or trio: 60 litres+
Lifespan: 3 – 5 years
Diet: Omnivore
Water flow: low
Preferred setup: Sand substrate, leaf litter, abundant driftwood, and small caves (such as coconut shells or terracotta pots).

About the Cockatoo Dwarf Cichlid

The Cockatoo Dwarf Cichlid (*Apistogramma cacatuoides*) is arguably the most robust and widely kept member of its extensive genus. Males boast a spectacular, elongated dorsal fin that bears a striking resemblance to a cockatoo's crest, giving the species its popular moniker. Decades of selective breeding by dedicated aquarists have yielded incredibly vibrant colour strains, notably the 'Triple Red' and 'Orange Flash', cementing their status as a striking centrepiece. They are highly engaging fish that offer a fascinating glimpse into complex cichlid behaviour within a manageable aquarium size.

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Is it right for your tank?

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Where Cockatoo Dwarf Cichlid comes from

Native range

Amazon Basin, Ucayali River Basin, Solimões River

Countries / regions

Peru, Brazil, Colombia

Habitat

Shallow, slow-moving tributaries and quiet backwaters filled with dense leaf litter, submerged roots, and fallen branches.

Native predominantly to the upper Amazon basin in Peru and western Brazil.

Similar species

Agassiz's Dwarf Cichlid
Apistogramma agassizii
Borellii Dwarf Cichlid
Apistogramma borellii
Macmaster's Dwarf Cichlid
Apistogramma macmasteri

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Neon Tetra
Paracheirodon innesi
Peaceful, mid-to-top water dwellers that act as excellent dither fish, encouraging the cichlids out into the open.
Great
Ember Tetra
Hyphessobrycon amandae
Small, tranquil tetras that occupy higher water levels and thrive in the same soft, warm water parameters.
Great
Brown Pencilfish
Nannostomus eques
Surface-dwelling fish that will entirely avoid the cichlids' benthic territories, completely eliminating territorial friction.
Great
Bronze Corydoras
Corydoras aeneus
Corydoras are oblivious benthic dwellers that may accidentally blunder into the cichlids' breeding caves, inviting severe attacks.
Compatible with caution
Tiger Barb
Puntigrus tetrazona
Excessively boisterous and prone to nipping, they will relentlessly harass the male cichlid's elaborate finnage.
Not recommended

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