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Genicanthus semifasciatus (Kamohara, 1934)
JAPANESE SWALLOW
Life   Vertebrata   Fish   Pomacanthidae   Genicanthus

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Following modified from Taiwan Biodiversity National Information Network
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Kingdom Animalia  
 Phylum Chordata  
 Class Actinopterygii  
 Order Perciformes  
 Family Pomacanthidae  
 Genus Genicanthus  
  Genicanthus semifasciatus    (Kamohara, 1934) 
Provider: Kwang-Tsao Shao 
hierarchy tree    download xml    download txt    Chinese Page    
Synonyms: Holacanthus semifasciatus   details
Citation: 臺灣魚類誌(沈等, 1993)
Character: Body moderately elongate, and strongly compressed. Preorbital bone convex and without strong spines. 1 prominent spines at angle of preopercle. Ventral edge of interopercle serrated. Eye moderately small. Mouth small, terminal, protractile, gape not extending to anterior rim or orbit. Scale on middle of body with focus on exposed portion. Anterior edge of lachrymal strongly serrated. Dorsal fin with XV spines and 15-16 soft rays; anal fin with III spines and 16-18 soft rays; caudal fin lunate. Males light bluish green with many narrow black bars on upper half of the sides, but not extending to the top of the head, and a yellow to orange mark on upper half of head exending to the middle of body; females without bars, yellowish brown on the upper sides and silver below; head above eye black, posterior parts of preopercle and opercle black; black stripes on both lobes of caudal fin joined on caudal peduncle. pratogynons hevmaph rotate. 
Habitat: Inhabits seaward rocky and coral reefs. Hardy aquarium species; takes standard food such as chopped beef, freeze-dried shrimp, mysids. 
Distribution: Distributed from southern Japan to Taiwan and northern Philippines. It is found in Lanyu and Lyudao, southeastern Taiwan. 
Utility: Marine aquarium fish. 
Name Code: 382299
  IUCN Red List:LC       Marine     
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Following modified from FishBase
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http://www.fishbase.org/Summary/speciesSummary.php?genusname=Genicanthus&speciesname=semifasciatus ---> https://www.fishbase.se/Summary/speciesSummary.php?genusname=Genicanthus&speciesname=semifasciatus
https://www.fishbase.se/Summary/speciesSummary.php?genusname=Genicanthus&speciesname=semifasciatus ---> https://www.fishbase.se/summary/Genicanthus-semifasciatus.html

Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Genicanthus semifasciatus (Kamohara , 1934)

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Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Pomacanthidae (Angelfishes)
Etymology: Genicanthus: Greek, geny, -yos = face, jaw + Greek, akantha = thorn (Ref. 45335 ) .

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

Marine; reef-associated; non-migratory; depth range 15 - 100 m (Ref. 9710 ).   Tropical

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

Western Pacific: southern Japan to Taiwan and northern Philippines.

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 21.0 cm TL male/unsexed; (Ref. 4858 )

Short description Morphology | Morphometrics

Dorsal spines (total): 15; Dorsal soft rays (total): 15-16; Anal spines : 3; Anal soft rays : 17.

Biology     Glossary (e.g. epibenthic)

Inhabits seaward rocky and coral reefs (Ref. 9710 ). Hardy aquarium species; takes standard food such as chopped beef, freeze-dried shrimp, mysids, etc. A protogynous hermaphrodite (Ref. 55367 ). Forms permanent harem groups composed of a single male and several smaller females (Ref. 55367 ).

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

A monandric species (Ref. 55367 ). Sex change occurs at 9.3 cm TL (Ref. 55367 ). Forms permanent harem groups composed of a single male and several smaller females (Ref. 55367 ). Also Ref. 103751.

Main reference Upload your references | References | Coordinator | Collaborators

Allen, G.R. , 1985. Butterfly and angelfishes of the world. Vol. 2. 3rd edit. in English. Mergus Publishers, Melle, Germany. (Ref. 4858 )

IUCN Red List Status (Ref. 120744 )

  Least Concern (LC)  ; Date assessed: 08 October 2009

CITES (Ref. 118484 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans

  Harmless




Human uses

Aquarium: commercial FAO(Publication : search ) | FishSource |

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Estimates based on models

Preferred temperature (Ref. 115969 ): 21.9 - 27.7, mean 24.3 (based on 24 cells). Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.5010   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.03311 (0.01544 - 0.07100), b=2.88 (2.69 - 3.07), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245 ). Trophic Level (Ref. 69278 ):  3.4   ±0.45 se; Based on food items. Resilience (Ref. 120179 ):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.). Vulnerability (Ref. 59153 ):  Low to moderate vulnerability (35 of 100) .

Entered by Reyes, Rodolfo B. Modified by Olisa, Kristine Elaine Paz Fish Forum
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