Fourmanoir's Perchlet, Plectranthias fourmanoiri Randall 1980

Other Names: Barred Perchlet, Doublespot Perchlet, Fourmanoir's Basslet, Tobiishi-hanadai (Japanese name)

Fourmanoir's Basslet, Plectranthias fourmanoiri, from Ile Uvea, Gambier Islands, French Polynesia - USNM 376763. Source: Jeffrey T. Williams, Division of Fishes, Smithsonian Institution, United States National Museum. License: CC by Attribution-NonCommercial-ShareAlike

A cream to reddish basslet covered in small gold ocellated spots, with 5 broad brown bands along the side, three prominent black blotches on the fins (one on the rear of the spinous dorsal fin, one on the rear base of the soft part of dorsal fin, and a third on the rear base of the anal fin), and two smaller blotches on the body (one before the dorsal fin, and another on the abdomen before the anus).

Cite this page as:
Bray, D.J. 2021, Plectranthias fourmanoiri in Fishes of Australia, accessed 30 Nov 2023,

Fourmanoir's Perchlet, Plectranthias fourmanoiri Randall 1980

More Info


Holmes Reef in the Coral Sea; also Christmas Island in the eastern Indian Ocean. Elsewhere the species is known from oceanic islands in the Western central Pacific: the Mariana Islands south to Indonesia, north to the Ryukyu Islands, Japan, and east to the Pitcairn Islands (central Pacific). Shelters in crevices on coral reefs, in lagoons and on exposed areas.


Dorsal fin X,18; Anal fin III,7: Pectoral fin 12-13, all rays unbranched; Caudal fin (unbranched rays 13); Pelvic fin I, 5; Gill rakers 4-7 + 10-12; Lateral line complete, tubed scales 25.
Body moderately elongate, laterally compressed, depth 3.0 in SL; head length 2.1 in SL, dorsal profile of head almost straight; snout slightly shorter than orbit diameter; orbit diameter 4.2 in HL; opercle with 3 flat spines; upper part of the preopercular margin with 3 spines. 
Caudal-fin margin rounded to slightly rounded; pectoral-fin rays all unbranched.
Maxillary scales absent, or a single small cycloid scale present at the posterior margin of the maxilla; lateral line complete.


39.5 cm SL


Overall reddish to orange-red above, whitish below, with with 5 broad brown bands, the first on the rear of the head, and the last on the caudal peduncle; dorsal  Three distinct black blotches - one on rear of spinous dorsal fin, one on rear base of soft part of dorsal fin, and a third on the rear base of the anal fin; two smaller blotches present - one anterior to dorsal fin, and another on abdomen in front of anus. Head yellowish with reddish blotches, a pale brown band from upper lip to margin of orbit. Fins reddish with yellowish blotches.


Feeds on small fishes and crustaceans.

Similar Species

The following combination of characters distinguishes Plectranthias fourmanoiri from congeners: palatines edentate; dorsal segmented rays usually 16–18 (rarely 20); fourth or fifth dorsal spine longest; pectoral rays 12–13, all unbranched; predorsal scales extend anteriorly only to vertical through mid-pupil; lateral line complete or interrupted, with 15–26 + 0–4 tubed scales. It is also distinctive in having a large black spot on the middle portion of dorsal fin, one near the end of the the dorsal fin, one over the base of the last four anal rays, and one mid-ventrally on the abdomen in front of the anus.


Named in honour of the late French ichthyologist Pierre Fourmanoir 'who obtained the specimen from Mangareva and realized that it represented a new species. He kindly abandoned his plan to describe the fish when he heard that the author had previously collected this species and intended to revise the genus.' 

Species Citation

Plectranthias fourmanoiri Randall 1980, Micronesica 16(1): 125, fig. 7. Type locality: Marshall Islands, Enewetak Atoll, Enewetak Island, coral head in lagoon off marine pier at north end of island, 15 m.


Bray, D.J. 2021


Atlas of Living Australia

Fourmanoir's Perchlet, Plectranthias fourmanoiri Randall 1980


Allen, G.R. & Erdmann, M.V. 2012. Reef fishes of the East Indies. Perth : Tropical Reef Research 3 vols, 1260 pp.

Allen, G.R. & Steene, R.C. 1988. Fishes of Christmas Island Indian Ocean. Christmas Island Natural History Association, Christmas Island, Indian Ocean, 6798, Australia. 197 pp.

Allen, G.R., Steene, R.C. & Orchard, M. 2007. Fishes of Christmas Island. Christmas Island : Christmas Island Natural History Association 2 edn, 284 pp. 

Gill, A.C., Pogonoski, J.J., Moore, G.I. & Johnson, J.W. 2021. Review of Australian species of Plectranthias Bleeker and Selenanthias Tanaka (Teleostei: Serranidae: Anthiadinae), with descriptions of four new species. Zootaxa 4918(1): 1-116.

Hobbs, J.-P.A., Newman, S.J., Mitsopoulos, G.E.A., Travers, M.J., Skepper, C.L., Gilligan, J.J., Allen, G.A., Choat, H.J. and Ayling, A.M. 2014. Checklist and new records of Christmas Island fishes: the influence of isolation, biogeography and habitat availability on species abundance and community composition. Raffles Bulletin of Zoology 30: 184-202.

Kuiter, R.H. 2004. Basslets, Hamlets and their relatives. A comprehensive guide to selected Serranidae and Plesiopidae. Chorleywood, UK : TMC Publishing 1, 216 pp. 

Myers, R.F. 1999. Micronesian reef fishes: a comprehensive guide to the coral reef fishes of Micronesia. Coral Graphics, Barrigada, Guam.  

Myers, R.F. & Donaldson, T.J. 2003. The fishes of the Mariana Islands. Micronesica 35-36: 598-652.

Randall, J.E. 1980. Revision of the fish genus Plectranthias (Serranidae: Anthiinae) with description of 13 new species. Micronesia 16(1): 101-187.  See ref online

Randall, J.E. 1996. Two new anthiine fishes of the genus Plectranthias (Perciformes: Serranidae), with a key to the species. Micronesica 29(2): 113-131. See ref online

Randall, J.E. 2005. Reef and shore fishes of the South Pacific. New Caledonia to Tahiti and the Pitcairn Islands. Honolulu : University of Hawaii Press 707 pp.

Tashiro, S. & Motomura, H. 2017. First Japanese Record of the Barred Perchlet Plectranthias fourmanoiri (Actinopterygii: Perciformes: Serranidae) from the Ryukyu Islands. Species Diversity 22: 81–85

Williams, J.T., Carpenter, K.E., Lawrence, A. & Myers, R. 2016. Plectranthias fourmanoiri. The IUCN Red List of Threatened Species 2016: e.T69588014A69592422. Downloaded on 07 January 2018.

Quick Facts

CAAB Code:37311200

Conservation:IUCN Least Concern

Depth:5-44 m

Fishing:Aquarium fish

Habitat:Reef associated

Max Size:5 cm TL

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