A popular Central American cichlid famous for the bright red coloration on its throat and belly, which it flares to intimidate rivals. They are earth-eaters, constantly sifting sand for food. While territorial, especially during breeding, they are relatively peaceful for a cichlid of their size compared to larger Central American counterparts.
At a Glance
Tank Requirements
Water Parameters
Temperament & Compatibility
Available Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Male
Adult males are larger, display the most intense red throat/belly coloration, and develop extended, pointed dorsal and anal fins. They are highly territorial, frequently flaring their gills to establish dominance.
Differs in 1 trait from base species
Also known as: Adult Male, Show Male
Female
Females are notably smaller and generally have less vibrant red coloration. Their fin edges are more rounded. They are less aggressive than males unless actively guarding eggs or fry.
Differs in 2 traits from base species
Also known as: Adult Female
Unsexed Juvenile
Young Firemouths are silvery with faint vertical bars and lack the signature red throat. Sexing is extremely difficult at this stage. They are often kept in groups to allow natural pairing as they mature.
Differs in 5 traits from base species
Also known as: Baby Firemouth, Juvenile
Firemouth Cichlid Care Summary
The Firemouth Cichlid, scientifically known as Thorichthys meeki, belongs to the Cichlids - Central American family group. Adults reach a maximum size of approximately 15 cm and have a compressed body shape with a moderate growth rate. Classified as semi-aggressive, this species primarily occupies the mid-level and bottom zones of the aquarium and produces a high level of biological waste.
To thrive, the Firemouth Cichlid requires a freshwater only aquarium with a minimum volume of 110 litres and a tank length of at least 90 cm. Water temperature should be maintained between 23°C and 30°C, with a pH range of 6.5–8 and a general hardness of 8–15 dGH. A moderate water flow is preferred. To replicate their natural habitat, the tank should include sand (sifters) and smooth gravel (sensitive barbels).
Firemouth Cichlid can be kept singly or in a group, making them flexible additions to most setups. Keepers should be aware that this species can be aggressive toward its own kind and will defend a territory within the tank. This species is available in 3 varieties: Male, Female, and Unsexed Juvenile. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Similar Species
Red Head Tapajos (Geophagus)
Geophagus sp. 'Red Head Tapajos'
A stunning and relatively peaceful South American Eartheater, recently formally described as Geophagus pyrocephalus. They are named for the bright red/orange coloration that develops on the heads of mature adults. As 'eartheaters', they constantly sift substrate through their gills to find food, making fine sand an absolute requirement to prevent injury. They are social cichlids that must be kept in groups.
Jack Dempsey
Rocio octofasciata
A robust, highly territorial Central American cichlid named after the aggressive 1920s boxer, William 'Jack' Dempsey. They exhibit beautiful iridescent blue, green, and gold spangling over a dark background. As aggressive diggers and plant destroyers, they require a tank with sturdy decor. They are best kept as a single wet pet or in a large tank with other similarly sized, robust Central American cichlids.
Flowerhorn Cichlid
Cichlasoma sp. hybrid
A man-made hybrid cichlid famous for its vibrant colors, extreme interactive personality, and the large nuchal hump (kok) on its head. They are incredibly aggressive 'wet pets' that will attack hands, tank mates, and equipment. They have a massive bioload, dig constantly, and must almost always be kept completely alone.
Texas Cichlid
Herichthys cyanoguttatus
The Texas Cichlid is the only cichlid species native to the United States. Known for their striking pearlescent blue/green spots and extreme territorial behavior, they require large tanks and robust filtration. They are notorious for rearranging aquariums, digging massive pits, and destroying live plants.
Convict Cichlid
Amatitlania nigrofasciata
One of the most ubiquitous and hardy cichlids in the hobby. Named for their black-and-white prison stripe pattern, Convicts are infamous for their intense aggression, especially when breeding (which they do readily). They are intelligent, wet pets that rearrange their tank décor constantly. Best kept in species-only tanks or with other robust Central American cichlids.
Clown Loach
Chromobotia macracanthus
A highly popular but large-growing shoaling fish famous for eating nuisance snails. Known for their striking orange and black bands, they are highly social and must be kept in groups. They have no standard scales, making them sensitive to medications and prone to Ich, requiring pristine, warm water. They are known for their quirky behavior of sleeping on their sides or backs.