Firemouth
cichlids (Thorichthys meeki) are native to
Central America. They occur in rivers of the
Yucatán Peninsula,
Mexico, south through
Belize and into northern
Guatemala. Their natural habitat is typically shallow, slow-moving, often
turbid, water with a
pH of 7.0 - 8.5. It has also been reported to live in underground cave systems. As fish with a tropical distribution, firemouth cichlids live in warm water with a temperature range of 23–30
°C (75–86
°F). The common name, firemouth, is derived from the bright orange-red colouration on the underside of the jaw. Males in particular flare out their gills, exposing their red throats, in a threat display designed to ward off male rivals from their territory. Like most cichlids,
brood care is highly developed; this species is an egg-layer. Firemouth cichlids form
monogamous pairs and spawn on flattened surfaces of rocks, leaves or submerged wood. Breeding males are primarily responsible for territorial defence, while females are more intensively involved in raising the fry, though both parents lead the fry in search of food. Firemouth cichlids are omnivorous and opportunistic in their feeding strategies. Sexual dimorphism is present, though limited in this species. Males are generally larger, (up to 15
cm), than females, have brighter and more red colouration around the throat, and have more pointed dorsal and anal fins. Firemouths are suitable for community aquaria, though they may become aggressive to other members of its species during spawning.
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