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Genicanthus semifasciatus (Kamohara, 1934)

Japanese swallow
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Native range | All suitable habitat | Point map | Year 2050
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Genicanthus semifasciatus   AquaMaps   Data sources: GBIF OBIS
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Philippines country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Also Ref. 9137. Known from Central and northern Phlilippines (Ref. 90102).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/rp.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Allen, G.R., 1985
National Database:

Common names from other countries

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

Teleostei (teleosts) > Acanthuriformes (Surgeonfishes) > 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: Lm ?  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. 130435)

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

CITES (Ref. 128078)

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. 82804):  PD50 = 0.5010   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.03090 (0.01359 - 0.07026), b=2.89 (2.70 - 3.08), 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.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (11 of 100).