Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Acanthuriformes (Surgeonfishes) >
Chaetodontidae (Butterflyfishes)
Etymology: uejoi: Named for Mr. Takuya Uejo, who first recognized its uniqueness while studying the taxonomy of species of Roa.
Eponymy: Takuya Uejo is a Japanese ichthyologist who was affiliated with the Graduate School of Fisheries, Kagoshima University. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range ? - 172 m (Ref. 126057). Tropical
Western Pacific: Mariana Is., Guam.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 10.1 cm SL male/unsexed; (Ref. 126057)
Dorsal spines (total): 11; Dorsal soft rays (total): 21 - 22; Anal spines: 3; Anal soft rays: 16 - 17; Vertebrae: 24. This species is distinguished from its congeners by the following set of characters: pored lateral-line scales 36-43; distal portion of the outer branch of first pelvic-fin soft ray a long filament, extending considerably from posterior contour of fin, first soft ray length 119%-123% of second ray; no black blotch on membranes associated with the first and second dorsal-fin spines; upper jaw naked, scaleless; pelvic-fin spine and first soft ray broadly whitish, and the remaining portions of fin black (in preserved specimens); the second black body band crossing pectoral-fin base, with no pale narrow interrupting lines; ocellated spot on dorsal-fin soft-rayed portion is more circular than oval, ratio of long axis/short axis of blotch 1.2-1.3 (Ref. 126057).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Matsunuma, M. and H. Motomura, 2022. Two new species of the butterflyfish genus Roa (Perciformes: Chaetodontidae). J. Fish Biol. 100(3):758-774. (Ref. 126057)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02239 (0.01097 - 0.04568), b=3.01 (2.84 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.6 ±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).
