Photo: User:Toniher (CC BY 2.5) — via Wikimedia Commons
Elegant Cory (Gastrodermus elegans)
A small, active bottom-dweller from the western Amazon with striking black-and-cream patterning and a bold, curious personality.
Will it live with a Elegant Cory?
We compare each fish against your elegant cory on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Agassiz's Corydoras✅ CompatiblePeaceful · 6 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Agassiz's Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Black Skirt Tetra✅ CompatibleSemi-aggressive · 6 cm · Easy care · 20–26 °C (68–79 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Black Skirt Tetra in a shoal of 6+ or it gets stressed and nippy.
- Blackline Rasbora✅ CompatiblePeaceful · 6 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Blackline Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Blood Red Tiger Pleco✅ CompatiblePeaceful · 6 cm · Medium care · 24–29 °C (75–84 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Butterfly Hillstream Loach✅ CompatiblePeaceful · 6 cm · Hard care · 18–24 °C (64–75 °F)
- Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Desert Goby✅ CompatibleSemi-aggressive · 6 cm · Easy care · 18–28 °C (64–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Diamond Tetra✅ CompatiblePeaceful · 6 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Diamond Tetra in a shoal of 6+ or it gets stressed and nippy.
- Eastern Betta✅ CompatibleSemi-aggressive · 6 cm · Medium care · 24–28 °C (75–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- False Julii Corydoras✅ CompatiblePeaceful · 6 cm · Easy care · 22–26 °C (72–79 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep False Julii Corydoras in a shoal of 6+ or it gets stressed and nippy.
- German Blue Ram✅ CompatiblePeaceful · 6 cm · Hard care · 27–30 °C (81–86 °F)
- Compatible on the things that matter: shared water near 27–28 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Glass Bloodfin Tetra✅ CompatiblePeaceful · 6 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Glass Bloodfin Tetra in a shoal of 6+ or it gets stressed and nippy.
- GloFish Tetra✅ CompatibleSemi-aggressive · 6 cm · Easy care · 21–28 °C (70–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep GloFish Tetra in a shoal of 6+ or it gets stressed and nippy.
- Guppy✅ CompatiblePeaceful · 6 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Hillstream Loach✅ CompatiblePeaceful · 6 cm · Hard care · 20–24 °C (68–75 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Neon Dwarf Rainbowfish✅ CompatiblePeaceful · 6 cm · Easy care · 23–27 °C (73–81 °F)
- Both are peaceful, and their water overlaps around 23–27 °C — no size, zone or temperament conflicts.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Neon Dwarf Rainbowfish in a shoal of 6+ or it gets stressed and nippy.
- Odessa Barb✅ CompatibleSemi-aggressive · 6 cm · Easy care · 20–26 °C (68–79 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Odessa Barb in a shoal of 6+ or it gets stressed and nippy.
- Panda Loach✅ CompatiblePeaceful · 6 cm · Hard care · 18–23 °C (64–73 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Peaceful Betta✅ CompatibleSemi-aggressive · 6 cm · Medium care · 24–28 °C (75–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Pearl Danio✅ CompatiblePeaceful · 6 cm · Easy care · 20–25 °C (68–77 °F)
- Compatible on the things that matter: shared water near 22–25 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Pearl Danio in a shoal of 6+ or it gets stressed and nippy.
- Platy✅ CompatiblePeaceful · 6 cm · Easy care · 21–28 °C (70–82 °F)
- Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Samurai Gourami✅ CompatiblePeaceful · 6 cm · Hard care · 24–28 °C (75–82 °F)
- Both are peaceful, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Slate Corydoras✅ CompatiblePeaceful · 6 cm · Medium care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 23–28 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Slate Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Smaragd Betta✅ CompatibleAggressive · 6 cm · Medium care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 23–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Three-striped Dwarf Cichlid✅ CompatibleSemi-aggressive · 6 cm · Medium care · 23–29 °C (73–84 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 23–28 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- African Butterfly Cichlid⚠️ With cautionSemi-aggressive · 8 cm · Medium care · 22–28 °C (72–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Amano Shrimp⚠️ With cautionPeaceful · 5 cm · Easy care · 18–28 °C (64–82 °F)
- Adult Amano Shrimp might survive with Elegant Cory, but expect the young to be eaten — plant heavily.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Amazon Puffer⚠️ With cautionPeaceful · 8 cm · Medium care · 23–28 °C (73–82 °F)
- Your 75 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Amazon Puffer in a shoal of 6+ or it gets stressed and nippy.
- Ash Lipped Apisto⚠️ With cautionSemi-aggressive · 7 cm · Hard care · 24–29 °C (75–84 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Black Ruby Barb⚠️ With cautionSemi-aggressive · 6 cm · Easy care · 22–26 °C (72–79 °F)
- Your 75 L tank is below the ~100 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Black Ruby Barb in a shoal of 6+ or it gets stressed and nippy.
- Bleeding Heart Tetra⚠️ With cautionSemi-aggressive · 7 cm · Medium care · 23–28 °C (73–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Bleeding Heart Tetra in a shoal of 6+ or it gets stressed and nippy.
- Bright Diamond Tetra⚠️ With cautionPeaceful · 7 cm · Hard care · 24–28 °C (75–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Bright Diamond Tetra in a shoal of 8+ or it gets stressed and nippy.
- Buenos Aires Tetra⚠️ With cautionSemi-aggressive · 7 cm · Easy care · 18–26 °C (64–79 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Buenos Aires Tetra in a shoal of 6+ or it gets stressed and nippy.
- Colombian Tetra⚠️ With cautionSemi-aggressive · 6.5 cm · Easy care · 24–28 °C (75–82 °F)
- Your 75 L tank is below the ~114 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Colombian Tetra in a shoal of 6+ or it gets stressed and nippy.
- Congo Tetra⚠️ With cautionPeaceful · 8 cm · Medium care · 22–28 °C (72–82 °F)
- Your 75 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Congo Tetra in a shoal of 6+ or it gets stressed and nippy.
- Dwarf Chain Loach⚠️ With cautionPeaceful · 6 cm · Medium care · 24–29 °C (75–84 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Dwarf Chain Loach in a shoal of 6+ or it gets stressed and nippy.
- Humpbacked Tetra⚠️ With cautionSemi-aggressive · 5 cm · Hard care · 24–28 °C (75–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Humpbacked Tetra in a shoal of 8+ or it gets stressed and nippy.
- Melon Barb⚠️ With cautionPeaceful · 7 cm · Easy care · 22–28 °C (72–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Melon Barb in a shoal of 8+ or it gets stressed and nippy.
- Morse Code Corydoras⚠️ With cautionPeaceful · 5 cm · Medium care · 23–26 °C (73–79 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Morse Code Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Rounded Filament Barb⚠️ With cautionPeaceful · 7 cm · Medium care · 22–27 °C (72–81 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Rounded Filament Barb in a shoal of 6+ or it gets stressed and nippy.
- Tiger Barb⚠️ With cautionSemi-aggressive · 7 cm · Easy care · 22–28 °C (72–82 °F)
- Your 75 L tank is below the ~95 L this pairing really wants — crowding raises aggression.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- Keep Tiger Barb in a shoal of 6+ or it gets stressed and nippy.
Compatibility is computed from each species' care data — a strong starting point, not a guarantee. Individual temperament varies, so always introduce new fish slowly and watch them.
Elegant Cory care specs
- Care level
- Easy
- Breeding
- Medium
- Max size
- 6 cm (2.4 in)
- Min tank size
- 60 L (15.9 gal)
- Temperature
- 22–28 °C (72–82 °F)
- pH
- 6–7.5
- Hardness
- 2–15 dGH
- Lifespan
- 3–8 years
- Diet
- Omnivore
- Swim level
- Bottom
- Group size
- 6+ (shoaling)
- Family
- Callichthyidae
- Origin
- South America — western Amazon Basin (Peru, Ecuador, Brazil: Napo, Ucayali, Solimões river systems)
What is an Elegant Cory?
The Elegant Cory (Gastrodermus elegans, long sold as Corydoras elegans) is a small armoured catfish native to the western Amazon Basin. Adults top out at around 5–6 cm (2–2.4 in), placing it at the larger end of its genus group while still being thoroughly compact by any aquarium standard. Its pale cream-to-olive body is overlaid with bold dark brown-to-black lateral blotches and a prominent dorsal stripe — a pattern striking enough to stand out against sand even in a busy community tank.
Unlike many shy, retiring bottom-dwellers, the Elegant Cory is genuinely active during daylight hours. A healthy shoal will spend most of its time zigzagging through the lower third of the tank, barbels pressed to the substrate, rooting through sand in search of morsels. That combination of bold markings, diurnal activity, and sociable group behaviour makes it one of the most rewarding and accessible cories for both beginners and experienced fishkeepers.
A 2025 phylogenomic revision moved the species from Corydoras to the resurrected genus Gastrodermus; the taxonomy has changed but the fish, its care, and its temperament have not.
Where do Elegant Corys come from?
Wild Elegant Corys inhabit the river systems of the western Amazon Basin, specifically the Napo, Ucayali, and Solimões drainages spanning Peru, Ecuador, and Brazil. These are slow-to-moderately flowing rivers and their smaller tributaries — shallow, shaded waterways where leaf litter accumulates on fine silty or sandy beds and tannins keep the water soft and slightly acidic.
Understanding that origin is the single most useful guide to providing good care. The fish are accustomed to warm, mineral-soft water, dim filtered light beneath a forest canopy, and a substrate they can push through without cutting their delicate barbels. Replicating those conditions — even approximately — will produce a confident, active, well-coloured shoal.
What tank size and setup does an Elegant Cory need?
A minimum of 60 litres (16 US gal) is appropriate for a starter group of six, the minimum number at which the species truly settles and behaves naturally. A 75–90 L (20–24 US gal) footprint gives a shoal proper room to patrol and makes water quality easier to maintain.
Substrate is critical: use fine sand or very smooth rounded gravel. Coarse or sharp substrates abrade the barbels continuously, leading to bacterial infections that are difficult to resolve once established. Soft sand is non-negotiable.
Decorate with driftwood branches and tangles, smooth stones, and a scattering of dried leaves (Indian almond or catappa work well). Dense planting on the periphery is welcome, but keep open sand patches in the mid-foreground — that is where you will actually see the fish working. Lighting should be moderate to subdued; floating plants help diffuse intense overhead light. Filtration must be efficient but gentle: a sponge filter or a canister with a spray-bar return keeps the water clean without subjecting small cories to a current they have to fight.
What water parameters do Elegant Corys need?
- Temperature: 22–28 °C (72–82 °F). Mid-range around 24–26 °C (75–79 °F) suits them well for everyday keeping.
- pH: 6.0–7.5. They tolerate a broad range but softer, slightly acidic conditions align with their wild habitat and support long-term health.
- Hardness: 2–15 dGH. They are comfortable in soft to moderately hard water; hard alkaline water over 15 dGH stresses them over time.
As with most sensitive bottom-dwellers, stability is as important as the target numbers. A tank that sits steadily at pH 7.2 and 10 dGH outperforms one that swings between 6.5 and 7.5 over the course of a week. Cycle the tank fully before adding the fish, perform weekly water changes of 25–30%, and test regularly.
What do Elegant Corys eat?
Elegant Corys are omnivores that feed close to or on the substrate. In the wild they sift through sediment for organic material, small invertebrates, detritus, and plant fragments. In the aquarium, that translates easily to a varied, sinking diet.
High-quality sinking wafers or pellets should form the staple — look for products formulated for bottom-feeders with spirulina, vegetable matter, and a meaningful protein percentage. Supplement two to three times per week with small live or frozen foods: bloodworm, tubifex, daphnia, and micro-worms are all accepted readily. Blanched courgette (zucchini) or cucumber slices, weighted to the bottom, provide plant matter and variety.
Feed after lights-out or just before — bottom activity picks up as tank-mates settle — and ensure food actually reaches the substrate rather than being intercepted by mid-water fish. Remove uneaten food within 24 hours to prevent fouling.
Are Elegant Corys peaceful — and what can live with them?
Elegant Corys are fully peaceful and present no aggression toward any other fish. They occupy the bottom zone exclusively, which makes them excellent community tank residents: they simply do not interact with mid-water or surface species in any confrontational way.
Ideal tank-mates are similarly peaceful community fish that will not pester, nip, or outcompete them for food. Small tetras (neons, rummies, embers), rasboras, pencilfish, small gouramis, and dwarf cichlids that tolerate the same soft-water conditions all work well. Avoid large, boisterous, or aggressive species, and be cautious with cichlids known to be substrate-territorial. Avoid anything that might nip fins — though the cories’ compact, armoured build makes them less vulnerable than long-finned species.
Keep in mind that Elegant Corys must be kept in groups of at least six. In smaller numbers they become shy and spend the majority of time hiding; the minimum shoal of six produces the relaxed, active, exploratory behaviour the species is known for.
For a full, filterable list of compatible and incompatible species, see Elegant Cory tank mates.
How do you tell male Elegant Corys from females?
Sexual dimorphism in Gastrodermus elegans is clearest when the fish are mature and viewed from above. Females are noticeably broader across the belly, particularly when gravid, giving them a distinctly rounder, fuller profile. This width is visible from the side as well, though the top-down view is more diagnostic. Males are slimmer overall and typically slightly smaller than females of equivalent age.
Outside of breeding condition, sexing juveniles under about 3 cm (1.2 in) is unreliable. Once the fish have matured — usually after six months of good feeding — a group of six or more will generally contain visibly different body shapes, making identification straightforward without handling.
How do Elegant Corys breed?
Breeding Gastrodermus elegans is achievable in the home aquarium but requires deliberate preparation, hence the medium difficulty rating. Begin by conditioning a mixed group — ideally two males to each female — with a protein-rich diet of live and frozen foods over two to four weeks.
Spawning is most reliably triggered by a simulated cool-season water change: replacing 30–50% of the tank water with cooler (by 3–5 °C / 5–9 °F) dechlorinated water, combined with a slight reduction in temperature, mimics the onset of the Amazonian rainy season and frequently prompts spawning behaviour within 24–48 hours.
The female carries one or two eggs cupped between her pelvic fins while the male fertilises them in the classic corydoras “T-position” embrace. She then deposits the sticky eggs on a clean flat surface — often the aquarium glass, a broad leaf, or a smooth stone. A healthy pair can deposit 50–150 eggs over several hours.
Remove eggs to a small, well-oxygenated hatching container or protect them in situ with a mesh barrier, as adults may eat them. Eggs hatch in three to five days at typical temperatures; the fry are free-swimming a day or two later and can accept microworms, freshly hatched brine shrimp nauplii, and powdered fry foods from the start.
What diseases do Elegant Corys commonly get?
Elegant Corys are hardy when water quality is maintained, but several issues appear consistently across the species:
Barbel erosion and infection is the most common problem and almost always results from a coarse or dirty substrate. Affected fish develop shortened, reddened, or necrotic barbels. Prevention is straightforward: use fine sand, maintain a clean bottom through regular siphoning, and keep nitrates below 20 ppm.
Ich (white spot) can strike any freshwater fish and is typically introduced via new fish, plants, or equipment. A quarantine tank for all new arrivals prevents transmission. Ich presents as small white dots resembling grains of salt and can be addressed by raising temperature slightly within the safe range and increasing aeration.
Bacterial infections (including fin rot and body sores) are secondary to water-quality lapses or physical injury. Pristine water and appropriate tank-mates remove most of the risk.
Parasitic infections (skin and gill flukes) can appear in new stock not quarantined properly. A mandatory 3–4 week quarantine period for all new fish is the primary defence.
Health note: medication dosing and disease diagnosis are beyond the scope of a care profile. For a sick fish, confirm symptoms against a reputable veterinary or fish-health resource before medicating. Many medications toxic to standard fish are particularly harmful to armoured catfish — always verify catfish safety before treating the whole tank.
How long do Elegant Corys live?
With appropriate care, Elegant Corys live 3–8 years, with the upper end achievable in well-maintained, stable aquariums. The wide range reflects how dramatically water quality, diet, and stress levels influence longevity in this family. Fish kept in soft sand-bottomed tanks with clean water, varied food, and a proper shoal of at least six tend to track toward the longer end of that span. Fish kept singly, on rough substrate, or in hard alkaline water rarely approach their potential lifespan.
Because many cories in the trade are collected as wild adults rather than tank-raised, exact age at purchase is often unknown. Buying from reputable sources who can confirm captive breeding gives you a better chance of a fish at the beginning of its lifespan rather than partway through it.
Frequently asked questions
Is Gastrodermus elegans the same as Corydoras elegans?
Yes. A 2025 phylogenomic revision resurrected the genus Gastrodermus; the Elegant Cory moved from Corydoras elegans to Gastrodermus elegans. It is the same fish the hobby has kept for decades — care, behaviour and tank requirements are unchanged.
Can I keep just two or three Elegant Corys?
They can survive in smaller numbers but thrive in groups of six or more. Below six, they are often skittish and spend most of their time hiding; a proper shoal brings out their active, social foraging behaviour and the fish display far better colour.
What you need to keep a elegant cory
The baseline is a heated, filtered 60 L+ tank: a reliable heater to hold 22–28 °C (72–82 °F), a gentle filter that won't batter a elegant cory in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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