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Pseudorasbora parva (Temminck & Schlegel, 1846)

Stone moroko
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Pseudorasbora parva
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Italy country information

Common names: Pseudorasbora
Occurrence: introduced
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Naturalized in 1988. Established in Northern Italy, expanding in central Italy (Ref. 45688). Found in the River Po in 1990 as reported from FISH Magazine of the Institute of Fisheries Management, Nottingham UK. Introduced accidentally into the Po and Tevere basins (Ref. 27118), Tuscany (Ref. 97736). Recorded for the 1st time in the Grosseto Province, now established in the middle and lower courses of the Ombrone, Albegna and Fiora. Found at a wide size range. Is also locally abundant (Ref. 45688). Invasive in north, central, and southern Italy (Ref. 119201). Interferes with native cyprinids (Ref. 94493). Has been reported in the shallow marine waters of the Tyrrhenian Sea (Ref. 97736).
National Checklist:
Country Information:
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Bianco, P.G. and V. Ketmaier, 2001
National Database: ICTIMED

Common names from other countries

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

Teleostei (teleosts) > Cypriniformes (Carps) > Gobionidae (Gudgeons)
Etymology: Pseudorasbora: Greek, pseudes = false + Rasbora, an Indian word for a fish, also used in Malay peninsula.
  More on authors: Temminck & Schlegel.

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

Freshwater; brackish; benthopelagic; pH range: ? - 7.0; dH range: ? - 15.   Temperate; 5°C - 22°C (Ref. 2060); 54°N - 22°N, 110°E - 141°E

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

Asia: Amur to Zhujiang [Pearl River] drainages in Siberia, Korea and China (Ref. 59043). Introduced to various areas in Europe and Asia. Several countries report adverse ecological impact after introduction (Ref. 1739).

Length at first maturity / Size / Weight / Age

Maturity: Lm 3.0  range ? - ? cm
Max length : 12.5 cm TL male/unsexed; (Ref. 88166); common length : 8.0 cm TL male/unsexed; (Ref. 1441); max. reported age: 5 years (Ref. 56557)

Short description Morphology | Morphometrics

Dorsal spines (total): 3; Dorsal soft rays (total): 7; Anal spines: 3; Anal soft rays: 6. Mouth superior and transverse; 6 branched anal rays; barbels absent; distal margin of dorsal convex; large adults with sexually dimorphic coloration (Ref. 43281).

Biology     Glossary (e.g. epibenthic)

Found in a wide variety of habitats, most abundantly in well vegetated small channels, ponds and small lakes (Ref. 59043). Adults occur in cool running water. Feed on small insects, fish and fish eggs (Ref. 30578), and plant material (Ref. 59043). Usually breed in habitats with still or very slow-flowing water (Ref. 59043). Females spawn 3-4 times in a season (Ref. 59043). Males clear the surface of the spawning site and guard the eggs until they hatch (Ref. 59043). Regarded as pest which competes with the fry of other species due to its high reproductive rate (Ref. 1739).

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

Nests under stones and the male cleans the cavity with its pearl organs. Eggs adhere to the ceiling of the cavity. The male leaves the nest before the eggs hatch. Females spawn 3-4 times during a season (Ref. 59043).

Main reference Upload your references | References | Coordinator | Collaborators

Kottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol and Freyhof, Berlin. 646 pp. (Ref. 59043)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 14 April 2020

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Potential pest

Human uses

Fisheries: of no interest; aquarium: commercial
FAO(Publication : search) | FishSource |

More information

Aquaculture profile
Mass conversion
Stamps, Coins Misc.
Swim. type
Gill area


Special reports

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Internet sources

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5312   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00665 - 0.00906), b=3.13 (3.09 - 3.17), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
Trophic level (Ref. 69278):  3.1   ±0.1 se; based on diet studies.
Resilience (Ref. 120179):  Medium, minimum population doubling time 1.4 - 4.4 years (tm=1; tmax=5; K=0.24; Fec=1,000).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (29 of 100).