Common name
Firemouth cichlid
Scientific name
Thorichthys meeki
Category
Freshwater fish
Group
Medium cichlids
Environment
Freshwater
Origin
Atlantic-slope drainages of Mexico, Belize and Guatemala
Care level
Intermediate
Adult size
12–15 cm
Expected lifespan
6–12 years
Minimum housing
At least 250 L with a broad sand floor and separated territories
Temperature
23–28 °C
pH
6.5–8.0
Hardness / minerals
Moderately soft to hard
Salinity
Freshwater
Lighting
Normal lighting with shaded root and plant cover
Placement / swimming zone
Bottom and lower-middle water

Identity and search names

This profile applies to Thorichthys meeki. Confirm trade identity and preserve breeder, supplier or locality records where relevant.

Environment and housing

Fine sand, smooth stones, roots, plants and several visual barriers with good oxygenation

Feeding and nutrition

Feeding ecology: Aquatic insects, larvae, crustaceans, detrital material and varied quality cichlid foods

Feeding routine: Offer measured varied meals once or twice daily and allow natural sand-sifting or picking

Breeding and reproduction

Open-substrate spawner laying eggs on stone, wood or an excavated site; both parents guard eggs and fry

Parental care: Biparental guarding of eggs, larvae and mobile fry

System demands

Filtration: Use mature biological filtration sized for the adult stock and feeding load, with guarded intakes and a flow pattern the species can use without continual effort.

Aeration: Maintain strong gas exchange and stable dissolved oxygen, especially overnight, during warm weather, medication, crowding or any interruption to filtration.

Maintenance: Test ammonia and nitrite after changes or abnormal behaviour; remove waste from the occupied zone and perform regular water changes matched to temperature and mineral chemistry.

Detailed husbandry

Identity scope
This profile applies to Thorichthys meeki. Confirm trade identity and preserve breeder, supplier or locality records where relevant.
Adult size and space
12–15 cm. At least 250 L with a broad sand floor and separated territories. Plan around adult dimensions, activity, group size, aggression and waste production rather than sale size.
Social structure
One compatible pair or a carefully managed group in a substantially larger aquarium
Swimming zone
Primary zone: All levels. Keep that zone usable for movement, feeding and refuge.
Feeding ecology
Aquatic insects, larvae, crustaceans, detrital material and varied quality cichlid foods
Feeding plan
Offer measured varied meals once or twice daily and allow natural sand-sifting or picking
Water stability
Maintain 23–28 °C; pH 6.5–8.0; hardness/minerals: Moderately soft to hard. Stable oxygenation and nitrogen-cycle control matter more than chasing one exact number.
Habitat structure
Fine sand, smooth stones, roots, plants and several visual barriers with good oxygenation
Compatibility plan
Use robust similarly sized fish and avoid chronic fin-nippers; breeding pairs require a controllable territory
Breeding plan
Open-substrate spawner laying eggs on stone, wood or an excavated site; both parents guard eggs and fry. Parental care: Biparental guarding of eggs, larvae and mobile fry.
Quarantine
Quarantine new fish in a separate cycled aquarium with dedicated equipment. Match temperature and mineral chemistry gradually, confirm feeding and normal respiration, and never add transport water to the established aquarium.
Welfare checks
Maintain the stated adult space and social structure, verify feeding and intervene early when injury, exclusion, weight loss, abnormal respiration or altered behaviour appears. Firemouth displays are designed to intimidate, but repeated cornering, mouth damage or food exclusion means the aquarium is too small or the social match has failed.
Biosecurity and release
Never release fish, fry, eggs, aquarium water, sediment, plants or live foods into drains, dams or natural waterways. Confirm current Australian import conditions and South Australian possession, trade and movement rules before acquisition or transfer.
Main risk
Firemouth displays are designed to intimidate, but repeated cornering, mouth damage or food exclusion means the aquarium is too small or the social match has failed.
Adult Projected Load
Moderate to high for adults because substrate sifting, pair territory, brood defence and omnivore feeding concentrate waste across the lower aquarium.
Filtration
Use mature mechanical and biological filtration with protected intakes and enough turnover for the adult group while preserving species-appropriate current and refuge.
Aeration
Provide strong gas exchange and backup aeration; increase oxygen support before warm weather, heavy feeding, crowding, medication or filter interruption reduces the safety margin.
Maintenance
Remove uneaten food and bottom waste, clean prefilters before flow falls, test ammonia and nitrite after changes, and perform regular temperature- and chemistry-matched water changes.
Overridable Warnings
Adult territory, pair aggression, sand-sifting space, secure structures, swimming room and robust filtration cannot be overridden.

Welfare and risk

Main risk

Firemouth displays are designed to intimidate, but repeated cornering, mouth damage or food exclusion means the aquarium is too small or the social match has failed.

Maintain the stated adult space and social structure, verify feeding and intervene early when injury, exclusion, weight loss, abnormal respiration or altered behaviour appears. Firemouth displays are designed to intimidate, but repeated cornering, mouth damage or food exclusion means the aquarium is too small or the social match has failed.

Non-overridable warning

Adult territory, pair aggression, sand-sifting space, secure structures, swimming room and robust filtration cannot be overridden.

Sources

Source note

CURRENT