Giant Sand Whiptail
Pseudohemiodon laticeps
A true sand giant from the southern basins of South America, accustomed to cooler waters. Flat and extremely wide, it resembles the shape of a guitar.
Water Temperature
22 - 28 °C
pH Value
6 - 7.5
Water type
Freshwater
Tank level
Bottom
Adult size
30 cm
Minimum tank volume
>= 400 L
Minimum group
>= 1
GH
2 - 15 dGH
KH
3 - 10 dKH
TDS
60 - 325 ppm
Conductivity
94 - 508 uS/cm
Species description
Geographical Origin and Habitat: Originating from the Paraguay River basin in South America. Inhabits slow-flowing rivers and swamps characterized by immense sandy bottoms without vegetation, where the water is moderately clear but often silty.
Taxonomy and Morphology: Flathead Whiptail (Pseudohemiodon laticeps). Extraordinary giant loricariid (up to 30 cm / 12 inches) but with an almost two-dimensional lateral profile. The flat ("laticeps") spatula-shaped head and the very long peduncle are its trademarks.
Social Behavior: Despite its formidable size, it is one of the most peaceful, shy, and static fish in the aquarium. It stays buried under the fine sand all day, moving slowly in the evening in search of worms on the bottom.
Coloration and Sexual Dimorphism: Splendid mottled sand color, mouse gray or golden brown, designed to make it a ghost on silty bottoms. Mature females have a more prominent abdomen, males develop slightly wider and fleshier lower lips for brooding.
Care, breeding and tankmates
Aquarium Setup: A vast tank "footprint" (at least 150x60 cm / 60x24 inches footprint). No coarse or sharp gravel: it is mandatory to use a dense layer of fine sand. Does not need wood to scrape, nor rocky shelters.
Diet and Feeding: Sand micro-predator. Ignores algae. Uses its impressive fimbriated lips (with tactile barbels) to "sniff" out protein food: live tubifex, bloodworms dropped at night, and slow-sinking pellets for carnivores.
Water Quality: Very robust species (tolerates pH 6.0-7.5 and various degrees of hardness) as long as oxygen levels are kept high with a moderate laminar flow. Superficially siphon the sand without creating anoxic zones.
Compatibility and Cohabitation: Extremely sociable but defenseless: it never defends its food. Coexists well with calm "floating" fish (Hatchetfish, small tetras). Avoid large digging Cichlids or quarrelsome Plecos that would deprive it of a meal and injure it.
Aquarium Breeding: Lip-brooder. The male carries a "disk" of about 40-50 eggs attached to his lower lip for over two weeks, moving around the aquarium with enormous caution.
Risks and Diseases: The greatest danger is slow death by starvation in "fast" aquariums. The presence of rough substrates will cause ventral ulcers and the destruction of the buccal sensory apparatus (cut barbels).
Geographic Origin and Distribution
Originating from the Paraguay River basin in South America. Inhabits slow-flowing rivers and swamps characterized by immense sandy bottoms without vegetation, where the water is moderately clear but often silty.
Origin
Extra-Amazon South America
Fish profile
- Temperament
- Semi-aggressive
- They have a very shy and retiring temperament. They rely on camouflage to avoid perceived threats. They will peacefully coexist with any non-aggressive species.
- Diet
- Carnivore
- This species is largely carnivorous and favors insect larvae. Captive diets should include sinking meaty wafers. Offering live foods occasionally will stimulate foraging behavior.
- Life expectancy
- 5-10 years
- This species has a lifespan ranging from 5 to 10 years when maintained in large aquariums with cool, clean water. Parameter stability and the prevention of ventral bacterial infections are critical factors for their survival. Overly warm environments or the absence of a proper substrate will drastically reduce their life expectancy.
- Adult size
- 30 cm
- The catalog's scalar value is 30 cm. The FishBase SPECIES table (v25.04 snapshot) source reports a maximum adult measurement of 29.8 cm for this species, recorded as standard length (SL). The taxonomic record consulted is Pseudohemiodon laticeps (v25.04); male or unsexed record. These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
- Sex ratio
- Specific M:F ratio
- There are no strict sex ratio requirements for this species. They are peaceful enough to be kept in any combination. Intraspecific squabbles are exceedingly rare.
- Feeding frequency
- Twice daily
- Feeding them once a day is usually sufficient. It is best to drop food in after lights off. Ensure faster tank mates do not steal their meals.
- Bioload
- This bottom dweller generates a moderate bioload. Efficient filtration is needed to handle their waste. Consistent water changes are essential for their well-being.
- Flow
- Stagnant
- They thrive in areas with gentle to moderate water flow. Well-oxygenated water is important for their respiration. Using a spray bar helps distribute the current evenly.
- Reproduction
- Oviparous
- Breeding them in the home aquarium is uncommon. Males exhibit paternal care through lip-brooding. Successful rearing depends on providing pristine and soft water conditions.
- Compatibility & tankmates
- They are quite peaceful towards other species. They can be safely housed with peaceful schooling fish. Aggressive bottom-feeders should be strictly avoided.
- Tank level
- Bottom
- This catfish spends almost its entire life on the bottom. It appreciates fine sand to partially bury itself. You will rarely see it detach from the substrate.
Scientific Parameters & Models
FishBase
Window to the official scientific data of the species
Data synced on: 06/15/2026
- Trophic level
- 2.4 ± 0.2 se
- Resilience
- Medium (1.4 - 4.4 years)
- Phylogenetic uniqueness (PD50)
- 0.5039
- Bayesian Length-Weight
- a = 0.00398, b = 3.11
- VulnerabilityLow to moderate vulnerability (26 / 100)
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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