Labroides dimidiatus   (Valenciennes,  1839) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

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Size: 9-14 cm.

Color: Bluish brown on back and pinkish or white below. A bluish black band from snout through eye to the end of caudal, broader on the posterior part of body, curving down at end of caudal fin and continued forward along lower part of caudal peduncle. A bluish black streak from lower edge of base of pectoral towards ventral. Basal part of dorsal bluish black, distal part whitish. Anal pale to white with a dark brown basal part. Pectoral and ventral yellowish.

Height 4.5-4.6, 5.2 in length with caudal. Head 3.4-3.8, 4-4.2 in length with caudal. Height of head 1.6-1.8 in its length. Eye 4.6-4.8, 1.3-1.7 in snout and 1.1-1.4 in somewhat convex inter orbital space. Mouth very small, horizontal. Lips swollen, the upper one with a median furrow, the lower one separated in two by a median frenulum and produced into lobe. Small pointed teeth in a crowded row in both jaws, in several rows near symphysis. Two somewhat curved canines anteriorly in each jaw. A canine at corner of mouth. Head naked, with exception of the superior and posterior part of the preopercle and the opercle. On upper part of head the scales begin far behind eye. About 14 rows of scales before dorsal. Dorsal spines pungent, short, the first about as long as eye, the last one eye diameter and a half. Soft dorsal higher than spinous part, the longest ray equal to snout and eye together. Anal spines slender, pungent. The first about half as long as the the second, the third longest, almost equal to snout and eye together. Soft anal similar to soft dorsal. Caudal truncate or slightly rounded. Pectorals as long as head with out snout. Verticals pointed, equal to snout and eye together. Scales on lateral line: 50-52 (+2 past hypural). Dorsal spines (total): 9-9; dorsal soft rays (total): 10-11; anal soft rays: 10.

Monogamous, protogynous hermaphrodite, external fertilization, nonguarders, open water/substratum egg scatterers. Pelagic spawners. Sex reversal is completed in 14-18 days. A monandric species. Length at sex change is 8.8 cm TL.

Max. age reported: 4 years

Stays in stations where other fish come to be cleaned. Cleaning intensity is not related to client size or commonness. Cleaning stations are occupied by a pair of adults, a group of juveniles or a group of females accompanied by a dominant male where a female becomes a functional male if the dominant male disappears. Some adults solitary and territorial. An unfamiliar visitor is usually greeted by dance-like movements with the tail maneuvering the back part of the body up and down. Juveniles behave this way when divers approach closely. A small body size and the presence of a lateral stripes both contribute as long-distance signals of cleaning services for fish clients.

Remarks: Values in above description denote proportions.

Synonym (s)
Cossyphus dimidiatus Valenciennes, 1839
(Senior synonym)
Labrus latovittatus Ruppell, 1835
Labroides paradiseus Bleeker, 1862
Labroides latovittatus Bleeker, 1862
Labroides dimidiatus Gunther, 1862
Labroides dimidiatus Klunzinger, 1871
Labroides dimidiatus Day, 1877
Labroides dimidiatus Gunther, 1881
Labroides dimidiatus Barnard, 1927
Labroides dimidiatus Fowler and Bean, 1928
Labroides dimidiatus Whitley, 1928
Cossyphus dimidiatus Cuvier and Valenciennes, 1839
Fissilabrus dimidiatus Smith, 1949
Labroides dimidiatus Day, 1878
Labroides dimidatus (Valenciennes, 1839)

Common Name (s)
• Blue Streaked Cleaner Wrasse (English)
• Haremkali (Mahl)
• Bluestreak Cleaner Wrasse (English)
• Cleaner Wrasse (English)
Economic Importance and Threats
Importance:  Commercial
(Aquarium, ornamental fish)

Habitat:  Reef Associated
Trophic Level:  Secondary Consumer
Prey:  Crustacean ectoparasites and mucus of other fishes


• Lakshadweep, Kavaratti Atoll (Lat: 10.55) (Long: 72.63) INDIA (Record: 01/1991-06/1992)
• Andaman and Nicobar Islands, Andamans INDIA
• Lakshadweep, Agatti INDIA
• Lakshadweep, Amini INDIA
• Lakshadweep, Chettalatt INDIA
• Lakshadweep, Kadamatt INDIA
• Lakshadweep, Kavaratti INDIA
• Lakshadweep, Kilttan INDIA
• Lakshadweep, Minicoy INDIA
• Lakshadweep INDIA
• Red Sea
• Andaman and Nicobar Islands, North Reef Island INDIA
• Lakshadweep, Kavaratti Atoll INDIA (Record: 01/1991-06/1992)
• Lakshadweep Islands INDIA (Record: 11/1993-01/1997)
• Karnataka, Netrani Island INDIA
• Andaman and Nicobar Islands INDIA

Literature Source(s)
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  • Murty, VS (2002) Marine ornamental fish resources of Lakshadweep CMFRI Special Publication CMFRI 72 1-134 Available at -
  • Thomas, S; Sreeram, MP; Kakati, VS; Manisseri, MK and George, RM (2011) Coral fish diversity in Netrani waters off Murudeshwar Karnataka, south India Indian journal of fisheries CMFRI 58(1) 45-51 Available at -
  • Ghosh, S; Ganeshamurthy, R; Balamurugan, J and Kumar, TTA (2011) Reef fishing- An off season amusement at Lakshadweep Fishing chimes 31(1) 128-130 Available at - NIO, Goa
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Page last updated on:2011-12-09

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