Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Percidae
(Perches) > Percinae
Etymology: Crystallaria: Latin, cristallum = ice (Ref. 45335).
Environment / Climate / Range
Freshwater; demersal. Temperate; 45°N - 31°N
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 16.0 cm TL male/unsexed; (Ref. 5723); common length : 9.0 cm TL male/unsexed; (Ref. 12193); max. reported age: 3 years (Ref. 12193)
Morphology | Morphometrics
(total): 10 - 17;
soft rays: 12 - 16. Gape width 3.7-6.1% SL; preorbital blotch adjoined to or narrowly separate from anterior orbital rim; and pelvic fins not falcate; cheek scale rows 4-14, modally 11; opercle scale rows 2-13, modally 4; mid-lateral blotches 8-14, modally 10; anal-fin rays 12-16, modally 14; dorsal-fin spines 10-17, modally 14; scales below the lateral line 7-14, modally 9 (Ref. 74948).
North America: Mississippi River basin from Ohio to Minnesota and south to southern Mississippi, northern Louisiana and southeastern Oklahoma in the USA; and on Gulf Slope in Escambia, Mobile Bay and Pearl River drainages. Now extirpated from Ohio, Kentucky, Indiana and Illinois.
Occurs in clean sand and gravel runs of small to medium rivers (Ref. 5723, 10294).
Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p.
IUCN Red List Status (Ref. 90363)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
CollaboratorsPicturesStamps, CoinsSoundsCiguateraSpeedSwim. typeGill areaOtolithsBrainsVision
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), based on all LWR estimates for this BS (Ref. 93245
Trophic Level (Ref. 69278
): 3.5 ±0.6 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (tmax=3).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (27 of 100) .