Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Cypriniformes
(Carps) > Catostomidae
(Suckers) > Catostominae
Etymology: Catostomus: Greek, kata = down + Greek, stoma = mouth (Ref. 45335).
Environment / Climate / Range
Freshwater; demersal. Temperate; 44°N - 35°N
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 41.0 cm TL male/unsexed; (Ref. 86798)
Blue head (darkest on adult; no blue in Little Colorado River, Arizona population), slender caudal peduncle, predorsal scales usually 50 or more, and 78-122 scales on lateral line (Ref. 86798).
North America: Snake River system (Columbia River drainage), Wyoming, and Idaho; Lake Bonneville basin, Idaho, Wyoming and Utah; south through upper Colorado river drainage (Grand Canyon and above), Wyoming, Colorado, Utah, New Mexico and Arizona in the USA. Two subspecies were recognized: Catostomus discobolus discobolus and Catostomus discobolus jarrovii.
Inhabits rocky riffles and runs of small to large rivers (Ref. 5723, 86798).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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. 96402)
CITES (Ref. 94142)
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=0.00501 (0.00206 - 0.01219), b=3.10 (2.88 - 3.32), based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 2.8 ±0.2 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (K=0.089-0.32).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (33 of 100) .