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Crenicichla tuca Piálek, Dragová, Casciotta, Almirón & Říčan, 2015

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drawing shows typical species in Cichlidae.

Argentina country information

Common names: [No common name]
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: This species is known only from the lower Iguazú River basin above the Iguazú Falls where it occurs predominantly in the main channel of the river but also in large tributaries (i.e. Deseado and San Antonio Rivers in the Misiones Province). It is not found in small tributaries, especially in areas without rocky bottoms. Its distributional range extends upstream of the Misiones Province into the neighboring state of Paraná, Brazil (Ref. 104794).
National Checklist: Argentina
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ar.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Piálek, L., K. Dragová, J. Casciotta, A. Almirón and O. Říčan, 2015
National Database:

Common names from other countries

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Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Cichlinae
Etymology: Crenicichla: Latin, crenulatus = cut, clipped + Greek, kichle = wrasse (Ref. 45335);  tuca: The specific name tuca is a Guaraní word (tucá), meaning toucan (Ramphastos) in reference to the similarly enlarged lips/beak..

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic.   Subtropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Lower Iguazú River basin above the Iguazú Falls in Argentina. Distributional range extends upstream of the Misiones Province, Argentina into the neighboring state of Paraná, Brazil.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 15.0 cm SL male/unsexed; (Ref. 104794)

Short description Morphology | Morphometrics

Dorsal spines (total): 20; Dorsal soft rays (total): 10-12; Anal spines: 3; Anal soft rays: 8 - 9

Biology     Glossary (e.g. epibenthic)

All specimens, except two, were collected in the main channel of the Iguazú River, where they occurred as single individuals among the rocks from the walkways over the river ramming their heads and thick lips against the rock surfaces (Ref. 104794).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Kullander, Sven O. | Collaborators

Piálek, L., K. Dragová, J. Casciotta, A. Almirón and O. Říčan, 2015. Description of two new species of Crenicichla (Teleostei: Cichlidae) from the lower Iguazú River with a taxonomic reappraisal of C. iguassuensis, C. tesay and C. yaha. Historia Natural 5(2):5-27. (Ref. 104794)

IUCN Red List Status (Ref. 130435)

  Not Evaluated 

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FishSource |

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Internet sources

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.2   ±0.5 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).