Photo: Charles & Clint (CC BY-SA 2.0) — via Wikimedia Commons
Texas Cichlid (Herichthys cyanoguttatus)
The only cichlid native to the United States — a big, bold, iridescent bruiser that rewards experienced keepers with fascinating behaviour and easy breeding.
Will it live with a Texas Cichlid?
We compare each fish against your texas cichlid on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Elephant-nose Knifefish✅ CompatiblePeaceful · 35 cm · Hard care · 24–29 °C (75–84 °F)
- Aggressive + Peaceful, 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.
- Marbled Hoplo✅ CompatiblePeaceful · 14 cm · Easy care · 22–28 °C (72–82 °F)
- Aggressive + Peaceful, 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.
- Snowball Pleco✅ CompatiblePeaceful · 16 cm · Medium care · 24–30 °C (75–86 °F)
- Compatible on the things that matter: shared water near 24–26 °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.
- Spotted Talking Catfish✅ CompatiblePeaceful · 15 cm · Easy care · 22–26 °C (72–79 °F)
- Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–26 °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.
- Weather Loach✅ CompatiblePeaceful · 25 cm · Easy care · 5–24 °C (41–75 °F)
- Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 20–24 °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.
- Yellow-spotted Pleco✅ CompatiblePeaceful · 35 cm · Medium care · 24–27 °C (75–81 °F)
- Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–26 °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.
- Banjo Catfish⚠️ With cautionPeaceful · 15 cm · Medium care · 20–26 °C (68–79 °F)
- Banjo Catfish is small enough to tempt Texas Cichlid; only risk it in a densely planted setup with hiding spots.
- Black Doras Catfish⚠️ With cautionPeaceful · 60 cm · Hard care · 22–28 °C (72–82 °F)
- Black Doras Catfish may hunt Texas Cichlid, fry or shrimplets — safest in a heavily planted tank.
- Your 300 L tank is below the ~500 L this pairing really wants — crowding raises aggression.
- Bristlenose Pleco⚠️ With cautionPeaceful · 12 cm · Easy care · 23–30 °C (73–86 °F)
- Texas Cichlid may bully the smaller Bristlenose Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Clown Loach⚠️ With cautionPeaceful · 30 cm · Medium care · 25–30 °C (77–86 °F)
- Your 300 L tank is below the ~400 L this pairing really wants — crowding raises aggression.
- Common Pleco⚠️ With cautionPeaceful · 45 cm · Medium care · 22–28 °C (72–82 °F)
- Your 300 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Denison Barb⚠️ With cautionPeaceful · 15 cm · Medium care · 18–25 °C (64–77 °F)
- Texas Cichlid clearly outsizes Denison Barb and is aggressive; risky unless the tank is big and well-planted.
- Texas Cichlid may hunt Denison Barb, fry or shrimplets — safest in a heavily planted tank.
- Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
- Giant Betta⚠️ With cautionPeaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
- Texas Cichlid clearly outsizes Giant Betta and is aggressive; risky unless the tank is big and well-planted.
- Giant Betta is small enough to tempt Texas Cichlid; only risk it in a densely planted setup with hiding spots.
- Giant Glass Catfish⚠️ With cautionPeaceful · 15 cm · Medium care · 22–27 °C (72–81 °F)
- Texas Cichlid clearly outsizes Giant Glass Catfish and is aggressive; risky unless the tank is big and well-planted.
- Giant Kuhli Loach⚠️ With cautionPeaceful · 12 cm · Easy care · 24–30 °C (75–86 °F)
- Texas Cichlid may hunt Giant Kuhli Loach, fry or shrimplets — safest in a heavily planted tank.
- Goldfish⚠️ With cautionPeaceful · 30 cm · Medium care · 18–22 °C (64–72 °F)
- Expect Texas Cichlid to harass Goldfish at times; give dense cover and watch them at feeding.
- Koi⚠️ With cautionPeaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
- Koi may hunt Texas Cichlid, fry or shrimplets — safest in a heavily planted tank.
- Your 300 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
- Mascara Barb⚠️ With cautionPeaceful · 12 cm · Medium care · 20–25 °C (68–77 °F)
- Texas Cichlid is aggressive and may chase or nip the smaller Mascara Barb — plant heavily and break up sight lines.
- Mascara Barb is small enough to tempt Texas Cichlid; only risk it in a densely planted setup with hiding spots.
- Keep Mascara Barb in a shoal of 8+ or it gets stressed and nippy.
- Medusa Pleco⚠️ With cautionPeaceful · 12 cm · Medium care · 26–30 °C (79–86 °F)
- Texas Cichlid may bully the smaller Medusa Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Moonlight Gourami⚠️ With cautionPeaceful · 15 cm · Easy care · 25–30 °C (77–86 °F)
- Expect Texas Cichlid to harass Moonlight Gourami at times; give dense cover and watch them at feeding.
- Texas Cichlid may hunt Moonlight Gourami, fry or shrimplets — safest in a heavily planted tank.
- Pearl Gourami⚠️ With cautionPeaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
- Expect Texas Cichlid to harass Pearl Gourami at times; give dense cover and watch them at feeding.
- Texas Cichlid may hunt Pearl Gourami, fry or shrimplets — safest in a heavily planted tank.
- Sailfin Pleco⚠️ With cautionPeaceful · 50 cm · Medium care · 22–28 °C (72–82 °F)
- Your 300 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Alligator Gar⛔ Not recommendedAggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
- Texas Cichlid and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
- Texas Cichlid is bite-sized to a 250 cm predatory alligator gar — it will be eaten.
- Your 300 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
- Clown Knifefish⛔ Not recommendedAggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
- Two assertive fish, one genuinely aggressive: Texas Cichlid and Clown Knifefish will hold territory and clash.
- Clown Knifefish (90 cm) is big enough to swallow the 33 cm Texas Cichlid whole.
- Your 300 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
- Fire Eel⛔ Not recommendedSemi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
- Two assertive fish, one genuinely aggressive: Texas Cichlid and Fire Eel will hold territory and clash.
- Fire Eel (100 cm) is big enough to swallow the 33 cm Texas Cichlid whole.
- Your 300 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Mekong Giant Catfish⛔ Not recommendedSemi-aggressive · 300 cm · Hard care · 20–28 °C (68–82 °F)
- Texas Cichlid and Mekong Giant Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Your 300 L tank is below the ~100000 L this pairing really wants — crowding raises aggression.
- Redtail Catfish⛔ Not recommendedAggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
- Texas Cichlid and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Texas Cichlid is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
- Your 300 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
- Spotted Gar⛔ Not recommendedAggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
- Texas Cichlid and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
- Texas Cichlid is bite-sized to a 90 cm predatory spotted gar — it will be eaten.
- Your 300 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
- Wels Catfish⛔ Not recommendedAggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
- Texas Cichlid and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Size gap is too large (300 vs 33 cm): Wels Catfish will treat Texas Cichlid as food.
- Your 300 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
- Wolf Cichlid⛔ Not recommendedAggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
- Two assertive fish, one genuinely aggressive: Texas Cichlid and Wolf Cichlid will hold territory and clash.
- Watch for Wolf Cichlid picking off any texas cichlid small enough to fit in its mouth.
- Your 300 L tank is below the ~760 L this pairing really wants — crowding raises aggression.
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.
Texas Cichlid care specs
- Care level
- Medium
- Breeding
- Easy
- Max size
- 33 cm (13 in)
- Min tank size
- 300 L (79.3 gal)
- Temperature
- 20–26 °C (68–79 °F)
- pH
- 6.5–8
- Hardness
- 8–20 dGH
- Lifespan
- 10–13 years
- Diet
- Omnivore
- Swim level
- Bottom
- Group size
- Best alone or in a pair
- Family
- Cichlidae
- Origin
- North America — Rio Grande drainage of southern Texas and northeastern Mexico
What is a Texas Cichlid?
The Texas cichlid (Herichthys cyanoguttatus) holds a unique distinction in the hobby: it is the only cichlid species with a natural range inside the United States, inhabiting the Rio Grande drainage along the Texas–Mexico border. Growing to around 30 cm (12 in) in aquariums — with large males occasionally reaching 33 cm (13 in) — and covered in glittering turquoise-blue and pearl spots set against an olive-grey background, it is an impressive fish that demands both respect and space. As males mature they develop a pronounced nuchal hump on the forehead, giving large specimens a powerful, almost prehistoric profile.
Despite its aggressive reputation, the Texas cichlid is a highly interactive fish that quickly learns to recognise its keeper. It will beg at the glass, rearrange substrate with gusto, and display with full-colour intensity during breeding. For the experienced cichlid keeper prepared to meet its substantial space requirements, it offers a decade or more of rewarding fishkeeping.
Where do Texas Cichlids come from?
Wild Texas cichlids originate from the Rio Grande and its tributaries across southern Texas and northeastern Mexico — a North American region of warm, clear-to-turbid water, sandy and rocky substrates, and moderate hardness. They inhabit slow-moving backwaters, pools, and stream margins, foraging in the substrate for invertebrates, plant material, and small prey.
Their wide tolerance for pH (6.5–8.0) and hardness (8–20 dGH) reflects this variable native habitat, making them among the more chemically adaptable large cichlids in the hobby. Most fish in the trade are captive-bred. Wild populations have also become established in Florida, Arizona, and Hawaii through aquarium releases — a reminder of how resilient this species is outside its native range.
What size tank do Texas Cichlids need?
The minimum for a single adult or bonded pair is 300 L (80 gal), and this should be considered a true floor rather than a comfortable target. A large, actively digging cichlid that reaches 30 cm generates substantial waste and needs room to establish a territory without constant stress; 400–500 L (105–130 gal) gives noticeably better results if you plan to add any tank-mates.
Substrate should be sand or fine gravel — Texas cichlids are enthusiastic diggers and will uproot anything not firmly anchored. Use large, smooth-edged rocks and driftwood to create territory markers and line-of-sight breaks. Plants are possible but must be potted or very robust; floating plants like hornwort survive the digging impulse better than rooted stems. A strong external canister filter rated well above the tank volume is essential — these fish are heavy feeders and produce correspondingly heavy waste.
What water parameters do Texas Cichlids need?
- Temperature: 20–26 °C (68–79 °F) — towards the upper end for active adults; the species tolerates cooler water better than most tropical cichlids.
- pH: 6.5–8.0; moderately hard, alkaline water is well-tolerated and mirrors natural Rio Grande conditions.
- Hardness: 8–20 dGH.
Stability matters most. Perform weekly water changes of 25–30% in a tank this size, and maintain strong mechanical filtration to keep nitrate in check. Their tolerance for a wide parameter range does not mean water quality can be neglected — chronically high nitrates suppress colour and immune function.
What do Texas Cichlids eat?
Texas cichlids are omnivores that accept a wide variety of food. A high-quality large cichlid pellet or stick forms a practical staple; rotate this with frozen or fresh foods such as earthworms, prawns, mussels, and large bloodworms. Vegetable matter — blanched courgette, peas, or spirulina-based foods — rounds out the diet and supports gut health. Feeder fish are unnecessary and carry disease risk; avoid them.
Feed adults once or twice daily, offering only what is consumed in a few minutes. Texas cichlids are enthusiastic eaters and will overeat if given the chance, leading to water-quality problems. Because they are bottom-oriented foragers, sinking pellets and food dropped near the substrate are more natural than surface foods.
Are Texas Cichlids aggressive — and what fish can live with them?
The Texas cichlid is genuinely aggressive, and this is not a trait that softens with age or management. Territories are defended vigorously, and breeding pairs become hostile to anything in the tank, regardless of size. The aggression is rooted in their cichlid biology — substrate spawning, parental guarding, and strong pair bonds all amplify territorial drive.
Workable companions are limited to similarly sized, robust species: large plecos (armoured and largely ignored), oscars, green terrors, or other Central American cichlids of comparable size and temperament. Even with appropriate tank-mates, a tank of 400 L+ with clear territory divisions created by rock work is necessary. Community fish, small tetras, livebearers, and invertebrates will not survive. For a full, filterable list of compatible species, see Texas Cichlid tank mates.
How do you tell male from female Texas Cichlids?
Sexing mature Texas cichlids is straightforward. Males grow larger, develop the characteristic nuchal hump on the forehead as they age, and display more intense blue-green iridescent spotting, especially during spawning condition. Females remain smaller and more compact, with a rounder belly — particularly obvious when gravid — and lack the pronounced cranial hump. In juveniles under 8–10 cm, reliable sexing is difficult; allow fish to grow on and sex will become apparent naturally.
How do Texas Cichlids breed?
Texas cichlids are substrate spawners rated as easy breeders once a compatible pair has formed. A bonded pair will clean and defend a flat rock or patch of substrate, where the female deposits several hundred eggs. Both parents guard the spawn aggressively, and fry are typically moved to pre-dug pits in the substrate as they hatch.
The main challenge is not spawning itself but pair formation: forcing two incompatible individuals together often results in the weaker fish being killed. The safest approach is to grow on a group of six or more juveniles and allow a pair to form naturally, then separate the pair into a dedicated breeding tank. Fry are large enough to accept crushed flake and baby brine shrimp quickly, and parental care is generally strong. Expect multiple spawns per year in well-fed, stable conditions.
What are common Texas Cichlid diseases?
Texas cichlids are hardy fish when kept in appropriately sized, well-maintained tanks. Common issues include ich (white spots, typically triggered by temperature drops or stress), hole-in-the-head disease (pitting around the lateral line and head — strongly associated with poor water quality and nutritional deficiency), bacterial infections (often secondary to physical injuries from conspecific aggression), and bloat or digestive problems from an overly protein-heavy diet without vegetable variety. The overwhelming majority of health problems trace back to water quality, overcrowding, or diet.
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 source before treating.
How long do Texas Cichlids live?
A well-kept Texas cichlid lives 10–13 years, making it a long-term commitment comparable to owning a medium-sized pet. Consistent water quality, a varied diet, sufficient space, and an appropriate social environment — whether a compatible pair or a carefully chosen species tank — are the main factors separating fish that reach their full potential from those that decline prematurely. Given the right conditions, a Texas cichlid purchased as a juvenile may still be a centrepiece fish a decade later.
Frequently asked questions
Can Texas cichlids live with other fish?
Only with species of similar size and toughness. They are highly territorial, especially when breeding, and will attack and kill smaller or more timid tank-mates. Robust Central American cichlids, large plecos, and similarly sized cichlids are workable options — but even then, a 400 L+ tank with clear territory boundaries is needed. Community fish are not suitable companions.
How big do Texas cichlids get?
Adults typically reach 25–30 cm (10–12 in) in aquariums, with large males occasionally touching 33 cm (13 in). Plan for a minimum 300 L tank for a single specimen or a bonded pair, and larger still if you want tank-mates.
What you need to keep a texas cichlid
The baseline is a heated, filtered 300 L+ tank: a reliable heater to hold 20–26 °C (68–79 °F), a gentle filter that won't batter a texas cichlid in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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