- Common name
- Altifrons eartheater
- Scientific name
- Geophagus altifrons
- Category
- Freshwater fish
- Group
- Eartheaters and geophagine cichlids
- Environment
- Freshwater aquarium
- Origin
- Amazon basin in Brazil and Ecuador
- Care level
- Advanced
- Adult size
- Up to about 26.5 cm total length
- Expected lifespan
- Plan for 10–15 years; a large adult eartheater is a long-term space, substrate and filtration commitment.
- Minimum housing
- At least 750 litres for a properly structured group of six or more adults; larger is safer
- Temperature
- 26–30 °C
- pH
- 5.0–6.5
- Hardness / minerals
- 1–10 °dGH (about 18–179 mg/L as CaCO3); KH should remain low to moderate and stable
- Salinity
- Freshwater; no routine salt addition
- Lighting
- Subdued to normal with shaded areas
- Placement / zone
- Bottom and lower-middle water
- Filtration
- Use mature biological filtration sized for the complete adult altifrons eartheater group, with guarded intakes and accessible mechanical capture. Keep flow moderate with strong oxygenation but broad sand areas free of harsh jets where the fish lives, and maintain undetectable ammonia and nitrite.
- Aeration
- Maintain reliable surface agitation and oxygen exchange at all times. Increase aeration during warm weather, medication, transport recovery, heavy feeding or any sign of rapid breathing.
- Maintenance
- Perform regular matched-water changes guided by nitrate and waste, remove uneaten food and trapped detritus, clean mechanical media without disrupting the biofilter, and record feeding, body condition, respiration and aggression.
Identity and search names
This profile applies to Geophagus altifrons, not every high-bodied Geophagus sold under an informal locality name.
Search names: Geophagus altifrons, Altifrons geophagus, Eartheater cichlid
Environment and housing
Fine inert sand is essential for normal feeding. Avoid sharp gravel that damages the mouth and gills.
Social structure: Maintain a meaningful group to distribute aggression. Avoid keeping only two or three juveniles that later form a dominant pair.
Feeding and nutrition
Feeding ecology: Benthic omnivore; siftable small foods, quality sinking pellets and varied frozen foods
Feeding routine: One or two measured feeds daily; adapt to body condition and species ecology
Breeding, reproduction or spread
Biparental mouthbrooding is reported for the genus; exact courtship and brood handling can vary. Provide space for pair formation and separation.
Detailed care and app-ready planning
- Identity scope
- This profile applies to Geophagus altifrons, not every high-bodied Geophagus sold under an informal locality name.
- Adult size and space
- Plan for 26.5 cm adults and a group of at least six. Floor area and territory separation matter more than nominal litres alone.
- Social structure
- Maintain a meaningful group to distribute aggression. Avoid keeping only two or three juveniles that later form a dominant pair.
- Swimming zone or placement
- Feeds mainly on and within the substrate but also uses lower and middle water.
- Feeding ecology
- Sifts sand for small invertebrates, detritus and edible organic matter.
- Feeding plan
- Use sinking foods that disperse across the substrate; verify subordinate fish retain body condition.
- Water stability
- Warm water holds less oxygen. Provide strong aeration, low nitrogen waste and steady pH rather than abrupt chemical adjustment.
- Habitat structure
- Fine inert sand is essential for normal feeding. Avoid sharp gravel that damages the mouth and gills.
- Compatibility plan
- Avoid very small fish, aggressive Central American cichlids and species that cannot tolerate 26–30 °C.
- Breeding or reproduction plan
- Provide quiet territories and be ready to separate fish if pair aggression becomes persistent.
- Quarantine
- Quarantine new fish in a large cycled system and screen for wasting, gill disease and abnormal faeces.
- Welfare checks
- Check jaw condition, gills, abdominal fullness, fin damage, social exclusion and access to food.
- Biosecurity and release
- Never release fish, eggs, aquarium water or sediment. Check current Australian and state rules before import, sale or movement.
- Main risk
- Housing a large social sand-sifting cichlid in an undersized or gravel-bottomed aquarium.
- Adult projected load
- Project biological load from the full adult altifrons eartheater group, adult body mass, feeding pattern, activity and social requirement rather than juvenile sale size. A group of large sand-sifting cichlids produces a high solids load and continually redistributes fine substrate.
- Filtration
- Use mature biological filtration sized for the complete adult altifrons eartheater group, with guarded intakes and accessible mechanical capture. Keep flow moderate with strong oxygenation but broad sand areas free of harsh jets where the fish lives, and maintain undetectable ammonia and nitrite.
- Aeration
- Maintain reliable surface agitation and oxygen exchange at all times. Increase aeration during warm weather, medication, transport recovery, heavy feeding or any sign of rapid breathing.
- Maintenance
- Perform regular matched-water changes guided by nitrate and waste, remove uneaten food and trapped detritus, clean mechanical media without disrupting the biofilter, and record feeding, body condition, respiration and aggression.
- Overridable warnings
- Non-overridable: do not accept persistent ammonia or nitrite, oxygen distress, starvation, chronic aggression or inadequate adult space. Different equipment, stocking or maintenance methods may be used only when measured water quality and adult welfare remain equivalent or better. The adult group requires a broad sand footprint, powerful filtration, compatible social structure and no sharp substrate.
- Identity
- A valid Geophagus species. Locality-labelled forms should not be merged unless provenance supports the identification.
- Environment
- Use a long aquarium with a deep area of fine rounded sand, open sifting zones, secure wood and rocks, and powerful biological filtration.
- Feeding
- Offer several small sinking meals so all group members feed while sifting. Include quality pellets, frozen invertebrates and some plant-derived material.
- Breeding
- Biparental mouthbrooding is reported for the genus; exact courtship and brood handling can vary. Provide space for pair formation and separation.
- Adult size and space
- Plan for 26.5 cm adults and a group of at least six. Floor area and territory separation matter more than nominal litres alone.
- Biosecurity and release
- Never release fish, eggs, aquarium water or sediment. Check current Australian and state rules before import, sale or movement.
- Welfare Risk
- Chronic crowding, damaged mouths, poor oxygen and group bullying are the main welfare failures.
Compatibility, welfare and risk
Compatibility: Best with robust peaceful fish too large to swallow and able to tolerate warm soft water
Welfare: Chronic crowding, damaged mouths, poor oxygen and group bullying are the main welfare failures.
Main warning: Large adult size, group social needs and continuous sand sifting make small aquaria unsuitable.
Biosecurity and release
Never release fish, eggs, aquarium water or sediment. Check current Australian and state rules before import, sale or movement.