Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic; pH range: 7.5 - 8.0; dH range: 13 - 19. Subtropical; 18°C - 32°C (Ref. 1672); 37°N - 36°N
North America: Amargosa River basin in Nevada and California, USA.
Six subspecies were recognized:
Cyprinodon nevadensis nevadensis, restricted to Saratoga Springs and adjoining lakes, Death Valley National Monument in California;
Cyprinodon nevadensis amargosae, restricted to Amargosa River in California;
Cyprinodon nevadensis calidae, now extinct, in outlets of North and South Tecopa Hot Springs in California;
Cyprinodon nevadensis shoshone , in outlet of Shoshone Springs in California; ,br>
Cyprinodon nevadensis mionectes, in large springs in lower Ash Meadows in Nevada;
Cyprinodon nevadensis pectoralis, in small springs in hills around Devils Hole, upper Ash Meadows in Nevada.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 7.8 cm TL male/unsexed; (Ref. 86798); common length : 4.5 cm TL male/unsexed; (Ref. 12193)
Occurs in springs, their effluents, and spring-fed ponds and lakes (Ref. 5723, 86798). Not a seasonal killifish. Is difficult to maintain in aquarium (Ref. 27139).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Its reproductive strategies differ from many spring-dwelling pupfishes. Cyprinodon n. amargosae is a group spawner. Males do not establish and defend territories as do males of spring-dwelling subspecies. Instead, a reproductive male usually directs a receptive female to the periphery of the group where spawning occurs, although spawning may even take place in the center of the group (www.death-valley.us).
Page, L.M. and B.M. Burr, 2011. A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p. (Ref. 86798)
IUCN Red List Status (Ref. 119314)
CITES (Ref. 115941)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01072 (0.00484 - 0.02371), b=3.22 (3.04 - 3.40), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 2.1 ±0.0 se; Based on diet studies.
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (16 of 100) .