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Ctenochaetus binotatus Randall, 1955
Twospot surgeonfish
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| Native range | All suitable habitat | Point map | Year 2050 |
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| This map was computer-generated and has not yet been reviewed. |
| Ctenochaetus binotatus AquaMaps Data sources: GBIF OBIS |
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Ctenochaetus binotatus
Picture by Randall, J.E.
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Picture by Randall, J.E.
Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) > Acanthuriformes (Surgeonfishes) > Acanthuridae (Surgeonfishes, tangs, unicornfishes) > Acanthurinae
Etymology: Ctenochaetus: Greek, kteis, ktenos = comb + Greek, chaite = hair (Ref. 45335); binotatus: Name from Latin 'bi' meaning two and 'notatus' meaning marked; referring to the black spots at the rear base of the dorsal and anal fins.
More on author: Randall.
Etymology: Ctenochaetus: Greek, kteis, ktenos = comb + Greek, chaite = hair (Ref. 45335); binotatus: Name from Latin 'bi' meaning two and 'notatus' meaning marked; referring to the black spots at the rear base of the dorsal and anal fins.
More on author: Randall.
Environment: milieu / climate zone / depth range / distribution range Ecology
Marine; reef-associated; depth range 0 - 60 m (Ref. 128797), usually 10 - 50 m (Ref. 27115). Tropical; 24°N - 34°S, 29°E - 122°W
Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Indo-Pacific: East Africa to the Tuamoto Islands, north to southern Japan, south to central New South Wales (Australia) and New Caledonia. Not known from the Red Sea, Gulf of Oman, the Gulf, the Hawaiian Islands, Marquesas, Rapa, Pitcairn Islands, and Easter Island.
Size / Weight / Age
Short description Identification keys | Morphology | Morphometrics
Dorsal spines (total): 8; Dorsal soft rays (total): 24 - 27; Anal spines: 3; Anal soft rays: 22 - 25. Prominent black spot at the rear base of dorsal and anal fins; adults with a bluish ring around the eye (Ref 1602). Dorsal and anal fins dark brown. Caudal fin brown in adults, yellow in young. Edge of lips smooth. Upper teeth usually with 5 denticulations (not including tip). Anterior gill rakers 23-29 (Ref 42056).
Inhabits coral and rubble areas of deep lagoon and seaward reefs. Usually solitary, grazing on surface algae (Ref. 90102). Feeds by scooping film of detritus and unicellular algae (e.g. dinoflagellate Gambierdiscus toxicus) that produce ciguatera toxin making this species a key link in the ciguatera food chain (Ref. 1602, 48637). Caught with nets (Ref. 30573).
Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Main reference
Upload your references | References | Coordinator : Randall, John E. | Collaborators
Randall, J.E and K.D. Clements, 2001. Second revision of the surgeonfish genus Ctenochaetus (Perciformes: Acanthuridae), with descriptions of two new species. Indo-Pac. Fish. (32):33 p. (Ref. 42056)
CITES
Not Evaluated
Threat to humans
Other (Ref. 1602)
Human uses
Fisheries: commercial; aquarium: commercial
FAO - Publication: search | FishSource | Sea Around Us
More information
Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Genetics
Genetics
Heterozygosity
Heritability
Genetics
Heterozygosity
Heritability
Human related
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Tools
Bio-Quiz | E-book | Field guide | Identification keys | Length-frequency wizard | Life-history tool | Point map | Classification Tree
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Special reports
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Internet sources
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | National databases | Otolith Atlas of Taiwan Fishes | Public aquariums | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record
Estimates based on models
Preferred temperature (Ref. 123201): 24.5 - 28.9, mean 27.7 °C (based on 1034 cells).
Phylogenetic diversity index (Ref. 82804): PD50 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.03388 (0.02171 - 0.05288), b=2.93 (2.80 - 3.06), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level (Ref. 69278): 2.0 ±0.00 se; based on food items.
Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153): Low vulnerability (12 of 100).
Nutrients (Ref. 124155): Calcium = 34.7 [21.3, 57.7] mg/100g; Iron = 0.248 [0.133, 0.599] mg/100g; Protein = 18.1 [16.8, 19.3] %; Omega3 = 0.13 [0.08, 0.21] g/100g; Selenium = 21.9 [12.8, 39.9] μg/100g; VitaminA = 44.8 [10.4, 180.9] μg/100g; Zinc = 0.382 [0.283, 1.300] mg/100g (wet weight); based on nutrient studies.