Photo: Clinton & Charles Robertson (CC BY 2.0) — via Wikimedia Commons
Tatauaia Payara (Hydrolycus tatauaia)
A torpedo-built predator with hollow sabre-teeth and a blazing red tail — the payara for specialist monster-fish keepers who mean business.
Will it live with a Tatauaia Payara?
We compare each fish against your tatauaia payara on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Black Doras Catfish✅ CompatiblePeaceful · 60 cm · Hard care · 22–28 °C (72–82 °F)
- Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Common Pleco✅ CompatiblePeaceful · 45 cm · Medium care · 22–28 °C (72–82 °F)
- Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Sailfin Pleco✅ CompatiblePeaceful · 50 cm · Medium care · 22–28 °C (72–82 °F)
- Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Yellow-spotted Pleco✅ CompatiblePeaceful · 35 cm · Medium care · 24–27 °C (75–81 °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.
- Bearded Corydoras⚠️ With cautionPeaceful · 10 cm · Medium care · 18–24 °C (64–75 °F)
- Tatauaia Payara may bully the smaller Bearded Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Bristlenose Pleco⚠️ With cautionPeaceful · 12 cm · Easy care · 23–30 °C (73–86 °F)
- Tatauaia Payara 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)
- Watch for Tatauaia Payara picking off any clown loach small enough to fit in its mouth.
- Elephant-nose Knifefish⚠️ With cautionPeaceful · 35 cm · Hard care · 24–29 °C (75–84 °F)
- Elephant-nose Knifefish is small enough to tempt Tatauaia Payara; 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)
- Expect Tatauaia Payara to harass Giant Glass Catfish at times; give dense cover and watch them at feeding.
- Tatauaia Payara may bully the smaller Giant Glass Catfish, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Koi⚠️ With cautionPeaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
- Your 2000 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
- Marbled Hoplo⚠️ With cautionPeaceful · 14 cm · Easy care · 22–28 °C (72–82 °F)
- Tatauaia Payara may bully the smaller Marbled Hoplo, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Medusa Pleco⚠️ With cautionPeaceful · 12 cm · Medium care · 26–30 °C (79–86 °F)
- Tatauaia Payara may bully the smaller Medusa Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Porthole Catfish⚠️ With cautionPeaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Tatauaia Payara may bully the smaller Porthole Catfish, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Rubber Lip Pleco⚠️ With cautionPeaceful · 12 cm · Easy care · 20–26 °C (68–79 °F)
- Tatauaia Payara may bully the smaller Rubber Lip Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Snowball Pleco⚠️ With cautionPeaceful · 16 cm · Medium care · 24–30 °C (75–86 °F)
- Tatauaia Payara may bully the smaller Snowball Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Spotted Rubbernose Pleco⚠️ With cautionPeaceful · 12 cm · Medium care · 20–26 °C (68–79 °F)
- Tatauaia Payara may bully the smaller Spotted Rubbernose Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Spotted Talking Catfish⚠️ With cautionPeaceful · 15 cm · Easy care · 22–26 °C (72–79 °F)
- Tatauaia Payara may bully the smaller Spotted Talking Catfish, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Upside-down Catfish⚠️ With cautionPeaceful · 10 cm · Easy care · 22–26 °C (72–79 °F)
- Tatauaia Payara may bully the smaller Upside-down Catfish, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Weather Loach⚠️ With cautionPeaceful · 25 cm · Easy care · 5–24 °C (41–75 °F)
- Weather Loach is small enough to tempt Tatauaia Payara; only risk it in a densely planted setup with hiding spots.
- Zebra Pleco⚠️ With cautionPeaceful · 10 cm · Hard care · 26–30 °C (79–86 °F)
- Tatauaia Payara may bully the smaller Zebra Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Alligator Gar⛔ Not recommendedAggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
- Two assertive fish, one genuinely aggressive: Tatauaia Payara and Alligator Gar will hold territory and clash.
- Size gap is too large (250 vs 59 cm): Alligator Gar will treat Tatauaia Payara as food.
- Your 2000 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)
- Tatauaia Payara and Clown Knifefish are both territorial and at least one is outright aggressive — expect serious fighting.
- Fire Eel⛔ Not recommendedSemi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
- Tatauaia Payara and Fire Eel are both territorial and at least one is outright aggressive — expect serious fighting.
- Tatauaia Payara is small enough to tempt Fire Eel; only risk it in a densely planted setup with hiding spots.
- Mekong Giant Catfish⛔ Not recommendedSemi-aggressive · 300 cm · Hard care · 20–28 °C (68–82 °F)
- Two assertive fish, one genuinely aggressive: Tatauaia Payara and Mekong Giant Catfish will hold territory and clash.
- Your 2000 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)
- Two assertive fish, one genuinely aggressive: Tatauaia Payara and Redtail Catfish will hold territory and clash.
- Tatauaia Payara is small enough to tempt Redtail Catfish; only risk it in a densely planted setup with hiding spots.
- Your 2000 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)
- Two assertive fish, one genuinely aggressive: Tatauaia Payara and Spotted Gar will hold territory and clash.
- Wels Catfish⛔ Not recommendedAggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
- Two assertive fish, one genuinely aggressive: Tatauaia Payara and Wels Catfish will hold territory and clash.
- Size gap is too large (300 vs 59 cm): Wels Catfish will treat Tatauaia Payara as food.
- Your 2000 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)
- Tatauaia Payara and Wolf Cichlid are both territorial and at least one is outright aggressive — expect serious fighting.
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.
Tatauaia Payara care specs
- Care level
- Hard
- Breeding
- Very Hard
- Max size
- 59 cm (23.2 in)
- Min tank size
- 2000 L (528.4 gal)
- Temperature
- 24–28 °C (75–82 °F)
- pH
- 6–7.5
- Hardness
- 2–12 dGH
- Lifespan
- 6–10 years
- Diet
- Carnivore
- Swim level
- Middle
- Group size
- Best alone or in a pair
- Family
- Cynodontidae
- Origin
- South America — Amazon, Orinoco and Essequibo river basins
What is the Tatauaia Payara?
The Tatauaia Payara (Hydrolycus tatauaia) is a torpedo-shaped predatory characin from the family Cynodontidae — the dogtooth characins. Reaching up to 59 cm (23 in) and capable of exceeding 2.5 kg, it is one of the most formidable members of its genus. The body is silver along the flanks with a dark blotch behind the opercle and a vivid red-to-orange caudal fin that earns it the trade names “firetail” and “red-tail payara.” Its most striking feature is a pair of long, hollow canine teeth on the lower jaw — designed to impale fast-moving prey — that slot into pits in the upper jaw when the mouth is closed.
This is not a fish for the average keeper. It demands extraordinary facilities, a confident feeding approach and a long-term commitment. For those who can meet those requirements, it is one of the most dramatic freshwater species in the hobby.
Where does the Tatauaia Payara come from?
Hydrolycus tatauaia is native to the major river systems of tropical South America — the Amazon and Orinoco drainages and the Essequibo basin of Guyana. In the wild it occupies fast-flowing, highly oxygenated sections of large rivers, ambushing schooling fish in open water. These habitats run soft and slightly acidic to neutral: pH 6.0–7.5, hardness 2–12 dGH and temperature 24–28 °C (75–82 °F) year-round. This is not a stagnant or murky-water animal — it needs clean, well-oxygenated water with meaningful current.
What size tank does the Tatauaia Payara need, and how should it be set up?
A minimum of 2,000 litres (530 US gallons) is the practical baseline for a single adult, and footprint matters as much as raw volume — a run of at least 3 m (10 ft) gives the fish the horizontal space it needs as an open-water sprinter. Keep the aquascape simple: sand or fine gravel, minimal rockwork in the swimming zone, and low plants along the back panel. Strong filtration targeting 8–10× turnover per hour, plus additional powerheads for directional current, keeps dissolved oxygen high. Subdued lighting reduces stress. A heavy, secure lid is essential — payara are powerful and unpredictable jumpers.
Weekly water changes of 30–50 % are the maintenance baseline. Nitrate accumulation stresses this species quickly, and it is far less forgiving of lapses than most fish of comparable size.
What water parameters does the Tatauaia Payara need?
- Temperature: 24–28 °C (75–82 °F). Stable heat is essential; avoid any sudden drop below 22 °C.
- pH: 6.0–7.5. Slightly acidic to neutral water matching its Amazonian and Orinocan origin.
- Hardness: 2–12 dGH. Soft to moderately hard; very hard water is not tolerated well long-term.
- Ammonia / Nitrite: Zero at all times. The biological load from a large piscivore is substantial.
- Nitrate: Keep below 20 ppm with consistent large water changes.
- Dissolved oxygen: High. Current, surface agitation and regular filter maintenance are all required.
Stability is the operative word. Parameter drift — a sudden pH swing, a temperature crash, or a nitrate spike from a skipped water change — can precipitate rapid health decline in a fish of this size.
What does the Tatauaia Payara eat, and how should it be fed?
The Tatauaia Payara is an obligate piscivore. Newly imported specimens almost always demand live prey, but live feeder fish carry parasites and should be phased out as quickly as possible. Most specimens can be weaned over days to weeks via patience and target training. Suitable long-term foods include:
- Whole dead fish (tilapia, trout or smelt fillets cut to appropriate size)
- Whole frozen silversides or lance fish, thawed
- Large earthworms
- Other large, meaty frozen foods presented on a feeding stick to mimic movement
Feed once daily or every other day — this is a predator with a large stomach, not a grazer. Remove uneaten food promptly to protect water quality. Vitamin supplementation on frozen foods is good practice for long-term specimens.
How does the Tatauaia Payara behave, and what fish can live with it?
The Tatauaia Payara is aggressive in the most literal sense: anything that fits in its mouth is food. Most specialist keepers house this species alone or in a same-species group in a vast system. Same-species groups carry social risks of their own — adults can turn on one another — and require enough space to avoid constant confrontation. If mixing with other species, the only realistic candidates are very large, fast-moving, open-water fish of comparable or greater size: large arowanas, robust large catfish, or similarly sized dogtooth characins. Introductions always carry risk and demand close monitoring.
For a detailed breakdown of which species have any realistic chance alongside this fish, see Tatauaia Payara tank mates.
How do you tell male from female Tatauaia Payara?
Sexual dimorphism in Hydrolycus tatauaia cannot be reliably determined by external examination. Females may be slightly fuller-bodied — particularly when gravid — but body condition, age and feeding state all affect girth, making this distinction inconsistent. No reliable secondary sex characteristics (fin shape, colour, structural features) are documented for this species. Keepers hoping to breed work with groups and infer pairing from behaviour rather than selecting individuals by appearance.
How does the Tatauaia Payara breed in captivity?
Breeding Hydrolycus tatauaia in captivity is rated very hard and has occurred only rarely. The hurdles are compounding: a vast aquarium is needed before a group can coexist at all, sexing is unreliable (see above), and the spawning triggers — likely seasonal flood simulation, temperature cycling and photoperiod shifts — are poorly documented for this species specifically.
Cynodontidae are generally believed to be open-water egg-scatterers with no parental care. A captive attempt would logically combine multi-month conditioning on premium foods with wet-season simulation: a gradual temperature dip followed by a rise, increased flow and large changes with slightly cooler, softer water. Even with all of that in place, success outside a large institutional facility remains exceptional. Breeding should not be a driver for acquiring this species.
What diseases commonly affect the Tatauaia Payara, and how are they prevented?
Large predatory fish are generally robust when water quality is excellent, but the Tatauaia Payara can be susceptible to:
- Ich (Ichthyophthirius multifiliis): White pinhead spots across the body and fins. Prevented by avoiding sudden temperature drops and by quarantining all new live fish before use as feeders.
- Bacterial infections and body ulcers: Typically secondary to physical injury (teeth, tank walls) or stress from poor water quality. Prevention is rigorous tank maintenance and a spacious, obstacle-free environment.
- Internal parasites: A genuine risk when live feeder fish are used; switching to frozen alternatives substantially reduces it.
- Stress-related decline: This species is sensitive to crowding, parameter swings and unsuitable companions. Chronic stress leads to food refusal and rapid deterioration.
Quarantine all new animals. Daily observation — noting clamped fins, loss of appetite or abnormal posture — allows early intervention before a problem becomes critical.
Health note: medication dosing and specific disease diagnosis are beyond the scope of a care profile. For a sick specimen, confirm symptoms against a reputable veterinary fish-health resource before treating, and be aware that large piscivores can be sensitive to some commonly used medications at standard doses.
How long does the Tatauaia Payara live?
A well-maintained Tatauaia Payara can live 6–10 years in captivity. Reaching the upper end requires sustained commitment: a tank it will not outgrow, pristine water quality kept up for years, a sound diet free of live-feeder reliance, and prompt attention to health. A specimen acquired as a juvenile will demand the same large, well-filtered aquarium throughout its adult life — there is no smaller system to move it into as it grows. Keepers who plan from the start for a 59 cm (23 in) fish in 2,000 L (530 gal) are the ones best positioned to see this species thrive.
Frequently asked questions
What do Tatauaia Payara eat in captivity?
They are obligate piscivores. Newly imported specimens often insist on live feeder fish, but most can be trained onto whole dead fish, large earthworms, and chunky frozen foods like whole silversides or lance fish. Persistence and target training usually work within a few weeks.
Can the Tatauaia Payara be kept with other fish?
Only very large, fast-moving tank-mates that cannot fit in its mouth have any chance — juveniles of large open-water species at similar size. In practice most keepers house them alone or in small groups of the same species in truly massive aquariums, as anything smaller is simply food.
What you need to keep a tatauaia payara
The baseline is a heated, filtered 2000 L+ tank: a reliable heater to hold 24–28 °C (75–82 °F), a gentle filter that won't batter a tatauaia payara in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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