Teleostei (teleosts) >
Eupercaria/misc (Various families in series Eupercaria) >
Labridae (Wrasses) > Cheilininae
Etymology: Cirrhilabrus: Latin, cirrus = curl fringe + Greek, labros = furious (Ref. 45335); isosceles: Named for the distinctive triangle of color on the midportion of the caudal fin; noun in apposition.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 24 - 60 m (Ref. 108439). Subtropical; 22°C - 27°C (Ref. 130608)
Western Pacific: Japan (Izu-Oshima), south to the Ryukyu Archipelago (Yaeyama Islands and Okinawa), Taiwan (Green Island), and the Philippines.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 10.0 cm SL male/unsexed; (Ref. 130608)
Short description
Identification keys | Morphology | Morphometrics
Dorsal spines (total): 11; Dorsal soft rays (total): 9; Anal spines: 3; Anal soft rays: 9. This species is distinguished by the following characters: D XI,9; A III,9 except holotype with III,8; pectoral-fin rays 14-15; lateral line interrupted with 16-17 + 6-8 scales; median predorsal scales 4-5; 2 horizontal scale rows on cheek below eye; gill rakers 15; body depth 29-34% SL; head length 29-36% SL; snout length 9-11% SL; caudal fin of terminal-phase (TP) male is broadly lanceolate, i.e. rhomboidal with an extension of central rays; pelvic fins are relatively short, not reaching anal-fin origin when depressed; colour of TP male in life orange-yellow dorsally suffusing to lavender ventrally; a bright pink-to-purplish stripe at rest and dead, but blue in life and especially when displaying, extending posteriorly from upper orbit across head before making an oblique downward slant behind pectoral-fin base, and then continuing just below mid-lateral line to base of caudal fin; a prominent long mid-dorsal-fin basal dark spot, with a mostly lavender blotch on upper body below spot; colour of initial-phase fish mainly uniformly orange with faint stripes along dorsum and weak manifestation of medial stripe (Ref. 108439).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Occurs in areas with flat or gently sloping bottoms with scattered low outcrops of rock and coral (Ref. 108439).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Tea, Y.-K., H. Senou and B.D. Greene, 2016. Cirrhilabrus isosceles, a new species of wrasse (Teleostei: Labridae) from the Ryukyu Archipelago and the Philippines with nores on the C. lunatus complex. J. Ocean Sci. Found. 21:18-37. (Ref. 108439)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Fisheries: commercial; aquarium: commercial
Tools
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Internet sources
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01585 (0.00700 - 0.03587), b=2.95 (2.76 - 3.14), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.4 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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