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> Acanthuriformes (Surgeonfishes) > Chaetodontidae (Butterflyfishes)
Etymology: semilunaris: The specific name 'semilunaris' is an adjective, referring to the halfmoon-shaped ocellated blotch on the dorsal fin..

Environment: milieu / climate zone / depth range / distribution range Ökologie

seewasser riff-verbunden; tiefenbereich 102 - 123 m (Ref. 126057). Tropical

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | Faunafri

Western Indian Ocean: Mascarene Ridge.

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm
Max length : 11.0 cm SL Männchen/unbestimmt; (Ref. 126057)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 11 - 12; Rückenflossenweichstrahlen (insgesamt) : 20 - 21; Afterflossenstacheln: 3; Afterflossenweichstrahlen: 16 - 17; Wirbelzahl: 24. This species is distinguished from its congeners by the following set of characters: pored lateral-line scales 37-41; black blotch present on each membrane associated with first and second dorsal-fin spines; upper jaw is covered with scales; pelvic-fin spine and distal portion of 1st soft ray are whitish, while remaining portions of fin dusky to black; second black body band crossing pectoral-fin base, and is interrupted by many pale narrow lines; ocellated blotch on the dorsal-fin soft-rayed portion semicircular or oval, with long axis/short axis ratio 1.6-2.0 (Ref. 126057).

Life cycle and mating behavior Maturities | Fortpflanzung | Spawnings | Egg(s) | Fecundities | Larven

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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 Rote Liste Status (Ref. 130435)

Nicht untersucht

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

FAO - Publication: search | FishSource |

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Trophic ecology
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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].

Trophic level (Ref. 69278): 3.6 ±0.4 se; based on size and trophs of closest relatives

Widerstandsfähigkeit (Ref. 120179): hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

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Roa semilunaris Matsunuma & Motomura, 2022