Actinopteri (ray-finned fishes) > Cyprinodontiformes
(Rivulines, killifishes and live bearers) > Fundulidae
(Topminnows and killifishes)
Etymology: Fundulus: Latin, fundus = bottom; a peculiar name for a topminnow, coined for a bottom species of Atlantic coast being "the abode of the fundulus mudfish" (Ref. 45335); olivaceus: From the Latin word Fundus=bottom, the habitat; olivaceus (Latin)=olive-colored (Ref. 79012).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic; non-migratory. Temperate; 15°C - 25°C (Ref. 2059); 38°N - 29°N
North America: Mississippi River basins from eastern Tennessee, western Kentucky, southern Illinois and central Missouri south to Gulf of Mexico (west to central Oklahoma) in the USA; Gulf Slope drainages from Chattahoochee River in Georgia to Galveston Bay in Texas, USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 8.0 cm TL male/unsexed; (Ref. 27139); common length : 7.5 cm TL male/unsexed; (Ref. 12193)
Inhabits near surface of quiet to flowing water, usually near margins of clear, sandy to gravelly headwaters, creeks and small rivers. 9.7 cm max TL (Ref. 5723). Feeds on terrestrial arthropods, aquatic insects, small crustaceans, and diatoms (Ref. 10294). Spawning occurs over gravel (Ref. 79012). Not a seasonal killifish. Is easy to maintain in the aquarium (Ref. 27139).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Huber, J.H., 1996. Killi-Data 1996. Updated checklist of taxonomic names, collecting localities and bibliographic references of oviparous Cyprinodont fishes (Atherinomorpha, Pisces). Société Française d'Ichtyologie, Muséum National d'Histoire Naturelle, Paris, France, 399 p. (Ref. 27139)
IUCN Red List Status (Ref. 125652)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00291 - 0.01803), b=3.17 (2.98 - 3.36), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.2 ±0.2 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (10 of 100).