Minckley's Cichlid

Herichthys minckleyi is an endemic species living in the spring pools and canals of the Cuatro Ciénegas basin in the Mexican state of Coahuila. Different mouth and jaw structures can develop within the same population: some individuals have fine teeth for feeding on insects and small creatures, while others have large molar teeth for crushing snail shells. Because of this feature it is frequently studied in evolutionary research. Its habitat is threatened by water use; it must not be collected from the wild, and only individuals bred for conservation should be kept.

• At least 250 liters and 120 cm of length for a pair.
• Hard, alkaline, mineral-rich water; sand substrate, rocks and caves.
• 26–28°C and good oxygenation; a 30% water change weekly.
• Adding snails to the aquarium supports natural feeding behavior.

Omnivorous. Make cichlid granules the staple; vary them with frozen bloodworms, mysis, shrimp and vegetables. Individuals with molar teeth eat small snails shell and all.

It shows the typical territorial behavior of the genus Herichthys; during breeding the front half of the body turns pale, the rear half turns black and the pair fiercely guards its area.

Good companions: robust fish of similar size that tolerate hard water: Thorichthys species, large livebearers, plecos.

Avoid: shrimp, snails, small and peaceful fish, species that need soft water.