An active, schooling rainbowfish native to the river systems of northern Australia. Named for the subtle iridescent, checkered pattern on their scales. They are highly energetic mid-water swimmers that require open horizontal swimming space combined with densely planted areas for security.
Chequered Rainbowfish At a Glance
Chequered Rainbowfish Tank Requirements
Will Chequered Rainbowfish fit in your tank?
Care guides tell you what Chequered Rainbowfish needs, the next question is whether your tank can safely provide it. Test Chequered Rainbowfish against your tank size, maintenance needs, and the fish you already keep before you buy.
Useful setup supplies
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Chequered Rainbowfish Water Parameters
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Chequered Rainbowfish Temperament & Compatibility
Chequered Rainbowfish Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard / Unsexed (Juvenile)
Commonly sold as juveniles (4-5cm) displaying a drab, silvery-olive coloration. They require several months of high-quality feeding and stable parameters to develop their signature deep bodies and vibrant adult colors.
Differs in 2 traits from base species
Also known as: Juvenile
Male
Mature males develop a significantly deeper body with a pronounced sloping forehead. Their elongated dorsal and anal fins are adorned with flashes of red, yellow, or orange, which intensify during morning displays.
Differs in 2 traits from base species
Also known as: Adult Male, Show Male
Female
Females maintain a more streamlined shape throughout their lives and are slightly smaller than males. Their colors are more subdued, but keeping females is essential to encourage the males to display.
Differs in 1 trait from base species
Also known as: Adult Female
Chequered Rainbowfish Care Guide Summary
The Chequered Rainbowfish, scientifically known as Melanotaenia splendida inornata, belongs to the Rainbowfish family group. Adults reach a maximum size of approximately 12 cm and have a compressed body shape with a moderate growth rate. Classified as peaceful, this species primarily occupies the surface and mid-level zones of the aquarium and produces a low level of biological waste.
To thrive, the Chequered Rainbowfish requires a freshwater only aquarium with a minimum volume of 110 litres and a tank length of at least 90 cm. Water temperature should be maintained between 24°C and 30°C, with a pH range of 6.5–8 and a general hardness of 8–20 dGH. A moderate water flow is preferred.
The Chequered Rainbowfish is a rewarding species to keep, provided its core environmental needs are met. This species is available in 3 varieties: Standard / Unsexed (Juvenile), Male, and Female. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Chequered Rainbowfish Habitat Setup
When setting up an aquarium for the Chequered Rainbowfish, a moderate water flow best suits their natural preferences. Because this species occupies the surface and mid-level zones, the aquarium layout should prioritise adequate surface area with floating cover to make them feel secure near the waterline and open swimming space in the centre of the tank for free movement. Useful additions include dense planting to provide cover, break sightlines, and reduce stress. Keepers should note that a tight-fitting lid is essential, as this species is a known jumper.
Chequered Rainbowfish Compatibility Notes
Classified as peaceful, the Chequered Rainbowfish is a schooling species that feels most secure in a sizeable group, where natural shoaling behaviour reduces stress and brings out their best colours. When choosing tankmates, shy or slow-feeding tankmates may be outcompeted at feeding time and their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the surface and mid-level zones can help reduce competition and territorial overlap.
Chequered Rainbowfish Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Chequered Rainbowfish.
30 Gallon Breeder
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
Show 10 more tank sizes
Chequered Rainbowfish Feeding & Diet Considerations
The Chequered Rainbowfish will eat fry, so breeding efforts in the same tank are unlikely to succeed and is an aggressive eater that may prevent timid tankmates from getting enough food, so target feeding or simultaneous feeding at opposite ends of the tank can help.
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Frequently Asked Questions About Chequered Rainbowfish
How big does Chequered Rainbowfish get?
Chequered Rainbowfish (Melanotaenia splendida inornata) typically reaches a maximum adult size of approximately 12 cm. They have a compressed body shape and a moderate growth rate.
What tank size does Chequered Rainbowfish need?
A minimum aquarium volume of 110 litres and a tank length of at least 90 cm are recommended for Chequered Rainbowfish. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Chequered Rainbowfish need?
Chequered Rainbowfish thrives in freshwater only conditions with a temperature range of 24–30°C, a pH between 6.5 and 8, and a general hardness of 8–20 dGH. A moderate water flow is preferred.
Is Chequered Rainbowfish peaceful or aggressive?
Chequered Rainbowfish is classified as peaceful with an aggression score of 2 out of 10. They are generally well-suited to peaceful community tanks.
How many Chequered Rainbowfish should be kept together?
Chequered Rainbowfish is a schooling species and should be kept in groups of at least 6. Larger groups help distribute aggression and encourage natural schooling behaviour.
Does Chequered Rainbowfish have any special tank requirements?
Yes. Chequered Rainbowfish benefits from plants - densely covered in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Does Chequered Rainbowfish need a lid on the tank?
Yes. Chequered Rainbowfish is a known jumper, and a tight-fitting lid or cover is essential to prevent escape. Even a small gap can be enough for a determined fish to leap out.
Top Tank Mates for Chequered Rainbowfish
These fish are strong compatibility matches for Chequered Rainbowfish based on water preferences, temperament, adult size, and tank behavior.
Dainty Cory (Salt and Pepper Cory)
Corydoras habrosus
Ideal Tank MatesZebra Shovelnose (Tigrinus Catfish)
Brachyplatystoma tigrinum
Ideal Tank MatesIncolicana Corydoras
Corydoras incolicana
Ideal Tank MatesEmerald Green Cory
Corydoras splendens
Ideal Tank MatesDuplicareus Corydoras
Corydoras duplicareus
Ideal Tank MatesLoxozonus Corydoras (C079/C082)
Corydoras loxozonus
Ideal Tank MatesPlants That Suit Chequered Rainbowfish
These plants pair well with Chequered Rainbowfish based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Afzel's Anubias
Anubias afzelii
Amazon Sword
Echinodorus amazonicus
Anacharis
Egeria densa
Anubias Barteri
Anubias barteri
Baby Tears
Lindernia rotundifolia
Balansae
Cryptocoryne crispatula
Fish Similar to Chequered Rainbowfish
Exquisite Rainbowfish
Melanotaenia exquisita
A highly active, schooling species native to the fast-flowing, clear streams of Australia's Northern Territory. True to their name, they display stunning metallic bodies with bright red-tipped fins. They require pristine, well-oxygenated water, plenty of horizontal swimming space, and should always be kept in groups of 6 or more.
Eastern Rainbowfish
Melanotaenia splendida
An active, schooling species native to Australia, highly variable in color depending on the catch location. They are fast swimmers that require long tanks with ample open swimming space. Because of their energetic feeding behavior, they can outcompete shy or slow-moving fish. Best kept in shoals to display natural morning sparring and courtship behaviors.
Banded Rainbowfish
Melanotaenia trifasciata
A large, robust, and highly active schooling fish native to Northern Australia. Famous for its intense geographic color variations (such as the red 'Goyder River' morph). They are peaceful but incredibly fast and vigorous swimmers, requiring long aquariums with plenty of open swimming space.
Crimsonspotted Rainbowfish
Melanotaenia duboulayi
A highly active, schooling freshwater fish endemic to eastern Australia, often considered the original 'Australian Rainbowfish' in the aquarium trade. Recognizable by a prominent crimson red spot on the operculum (gill cover) and striking silvery-blue to greenish bodies. They are peaceful but extremely vigorous swimmers, requiring plenty of horizontal swimming space and a tight-fitting lid to prevent jumping.
Barred Rainbowfish
Chilatherina fasciata
A robust, active, and highly colorful schooling fish native to the clear, fast-flowing streams of New Guinea. They are named for the distinctive vertical black bars on their lower flanks. As highly active swimmers that do best in hard, alkaline water, they require a spacious, long aquarium (minimum 4 feet) with strong oxygenation and plenty of open swimming space.
Celebes Rainbowfish
Marosatherina ladigesi
An active, schooling fish native to the karst (limestone) streams of Sulawesi, Indonesia. Known for their striking neon blue lateral stripes and yellowish fins. They strictly require hard, alkaline water to thrive and are highly sensitive to soft, acidic conditions. A peaceful species that requires plenty of open swimming space.