Classification / Names
Common names from other countries
Main reference
Size / Weight / Age
Max length : 10.0 cm TL male/unsexed; (Ref. 559); common length : 4.5 cm TL male/unsexed; (Ref. 50519)
Environment
Marine; freshwater; brackish; demersal; pH range: 7.0 - ? ; dH range: 20 - ?; amphidromous (Ref. 51243)
Climate / Range
Subtropical; 16°C - 20°C (Ref. 2060), preferred ?; 54°N - 7°N, 106°E - 145°E
Distribution
Asia: river basin of the seas of Japan, Okhotsk, the Pacific coasts of Japan,Hokkaido, Ryukyu, Taiwan, rivers of Korea, continental China and the Philippines (Ref. 26334); Viet Nam (Ref. 89724). Introduced to the USA (Washington, Columbia and Portland, Oregon) (Ref. 92840).
Countries | FAO areas | Ecosystems | Occurrences | Introductions
Short description
Dorsal
spines
(total): 7;
Dorsal
soft rays
(total): 8;
Anal
spines: 1;
Anal
soft rays: 8;
Vertebrae: 26. This species is distinguished from its congeners by the following set of characters: D2 I,8; A I,8; pectoral-fin rays fin rays 36-40 (modally 19); longitudinal scale rows 32-35; transverse scale rows 9-10; predorsal scales 11-13 with a trifurcate anterior margin of which point 3 lies above the upper gill opening; vertebrae 10 + 16 = 26; gill opening extending ventrally to the vertical midline of the opercle. Coloration of males and females: males' basal region of body scale pockets with a bright orange spot, somewhat indistinct in females; the lateral side of females with a middle longitudinal row of discontinuous brownish black spots or bars and their dorsal lateral region with 3-4 longitudinal rows of black spots and the caudal fin base with 2 separate, vertical black bars; males with second dorsal fin with 4 longitudinal rows of reddish brown bars or spots and caudal fin with 8-10 waving vertical orange to brown stripes; pectoral fin base with a basal distinct, oblique deep brown stripe; cheek scattered with 16-25 small, orange red spots, brighter in males; the pectoral fin base of the species with a basal distinct, oblique deep brown stripe, followed by a parallel shorter, lighter stripe or waving mark (Ref. 104792).
IUCN Red List Status (Ref. 115185)
Threat to humans
Harmless
Human uses
More information
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
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Estimates of some properties based on models
Phylogenetic diversity index
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)
Trophic Level
3.3 ±0.4 se; Based on size and trophs of closest relatives
Resilience
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Vulnerability
Low vulnerability (22 of 100)
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