
San Ignacio Pupfish
NameSan Ignacio Pupfish
Scientific NameCyprinodon pachycephalus
Common NamesSan Ignacio Pupfish
FamilyCyprinodontidae
OriginMexico, Baja California Sur, Ojo de Liebre Lagoon
Temperamentsemi-aggressive
Dietomnivore
Care Leveladvanced
Minimum Tank Size (Gallons)20
Max Size (Inches)2
Water TypeBrackish
Temperature Range (°F)68-82
pH Range7.5-8.5
Compatible SpeciesSpecies-specific tank recommended due to specialized habitat requirements
Description
The San Ignacio Pupfish is a small, hardy fish endemic to the hypersaline Ojo de Liebre Lagoon system in Baja California Sur, Mexico. It is renowned for its exceptional tolerance to extreme environmental conditions, including high salinity and significant temperature fluctuations. Males can be territorial, especially during breeding.




