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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.
Lingkungan: lingkungan / zona iklim / kisaran kedalaman / jangkauan distribusi
Ekologi
laut berasosiasi dengan karang; kisaran kedalaman 102 - 123 m (Ref. 126057). Tropical
Western Indian Ocean: Saya de Malha Bank. High Seas only.
Ukuran / Berat / umur
Kematangan: Lm ?  range ? - ? cm
Max length : 11.0 cm SL jantan/; (Ref. 126057)
Duri punggung (Keseluruhan (total)) : 11 - 12; duri punggung lunak (Keseluruhan (total)) : 20 - 21; Duri dubur: 3; Sirip dubur lunak: 16 - 17; vertebrata, bertulang belakang: 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).
Cross section: compressed.
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)
Status IUCN Red List (Ref. 130435: Version 2025-2 (Global))
ancaman kepada manusia
Harmless
penggunaan manusia
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimasi berdasarkan model
Indeks keanekaragaman filogenetik (Acuan
82804): PD
50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02239 (0.01107 - 0.04526), b=3.01 (2.84 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Tingkat Trofik (Acuan
69278): 3.6 ±0.4 se; based on size and trophs of closest relatives
Daya lenting (Acuan
120179): Tinggi, Waktu penggandaan populasi minimum kurang dari 15 bulan (Preliminary K or Fecundity.).
Kerentanan Penangkapan Ikan (Ref.
59153): Low vulnerability (10 of 100).
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