dcsimg

Diagnostic Description

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Description: Changes color when frightened or when observed at night. The dorsal portion of the body turns black except for two white patches (Ref. 1602). Snout length 2.6-3.3 in HL. Body depth 1.6-1.8 in SL (Ref. 90102).
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Recorder
Susan M. Luna
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Life Cycle

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Distinct pairing (Ref. 205). Monogamous mating is observed as both obligate and social (Ref. 52884).
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Susan M. Luna
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Morphology

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Dorsal spines (total): 12 - 13; Dorsal soft rays (total): 18 - 21; Analspines: 3; Analsoft rays: 16 - 18
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Susan M. Luna
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Trophic Strategy

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Occurs inshore (Ref. 75154).
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Susan M. Luna
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Biology

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Usually solitary or in pairs in coral-rich areas of reef flats, lagoons, and seaward reefs to a depth of over 15 m. Juveniles inshore. In pairs or traveling in small groups (Ref. 48636). Feed on octocorallian and scleractinian coral polyps. Oviparous (Ref. 205). Form pairs during breeding (Ref. 205). Easy to maintain in the aquarium. Minimum depth reported taken from Ref. 30874.
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Estelita Emily Capuli
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Importance

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aquarium: commercial
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Estelita Emily Capuli
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分布

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分布於印度-太平洋區,西起紅海、東非洲,東至薩摩亞,北至日本南部,南至羅得豪島(Lord Howe I.)。台灣各地岩礁及珊湖礁海域皆可見其蹤跡。
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臺灣魚類資料庫
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利用

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一般以潛水方式捕捉。為觀賞魚類,無食用經濟價值。可輕易存活於水族箱內。
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描述

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體高而呈卵圓形;頭部上方輪廓平直。吻尖,但不延長為管狀。前鼻孔具鼻瓣。前鰓蓋緣具細鋸齒;鰓蓋膜與峽部相連。兩頜齒細尖密列,上下頜齒各約6-7列。體被中型鱗片,圓形,全為斜上排列;側線向上陡昇至背鰭第IX棘下方而下降至背鰭基底末緣下方。背鰭單一,硬棘XII,軟條20-21;臀鰭硬棘III,軟條17-18。體淡黃色,背部黑色;體側具21-22條斜向後上方之暗色紋;頭部鑲黃緣的黑色眼帶窄於眼徑,僅延伸至喉峽部。各鰭金黃色;胸鰭淡色,僅基部黃色;尾鰭前半部黃色,後半部灰白色,中間具黑紋。幼魚尾柄上具眼點,隨著成長而漸散去。
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棲地

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棲息於潟湖、礁盤及面海的珊瑚礁區。通常成魚成對或成群生活。以珊蝴蟲為食。
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Blackback butterflyfish

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The black-backed butterflyfish or blackback butterflyfish (Chaetodon melannotus) is a species of butterflyfish (family Chaetodontidae). It is widespread through the Indo-Pacific area from the Red Sea and East Africa to Samoa, to southern Japan and throughout Micronesia.[3]

This fish grows up to 18 cm (ca. 7 in) long, and may live for up to 20 years. When observed at night or when frightened, this species changes color; the dorsal portion of the body turns black except for two white patches.[3]

It belongs to the large subgenus Rabdophorus which might warrant recognition as a distinct genus. In this group, it appears a close relative of the spot-tailed butterflyfish (C. ocellicaudus) and somewhat less close to the yellow-dotted butterflyfish (C. selene). These are all of oval shape, silvery with yellow fins and snout, ascending diagonal stripes, and black markings around the eyes, on the caudal peduncle, and sometimes on the back. Next closest seem the saddle butterflyfish (C. ephippium) and the dotted butterflyfish (C. semeion), but these are already so distant that their ancestors must have diverged from those soon after the Rabdophorus lineage started to diversify.[4][5]

These oviparous fish are common on staghorn coral thickets, they are less seen on exposed parts of reefs. Black-backed butterflyfish are generally found between 4 and 20 m deep, usually solitary, in pairs during the breeding season. Juveniles are more commonly found inshore, in pairs or traveling in small groups. It feeds primarily on the polyps of soft and hard corals. The Black-backed Butterflyfish is easy to maintain in the aquarium by the standards of its genus.[2]

References

  1. ^ Myers, R.F.; Pratchett, M. (2010). "Chaetodon melannotus". IUCN Red List of Threatened Species. 2010: e.T165689A6092221. doi:10.2305/IUCN.UK.2010-4.RLTS.T165689A6092221.en. Retrieved 20 November 2021.
  2. ^ a b Froese, Rainer; Pauly, Daniel (eds.) (2019). "Chaetodon melannotus" in FishBase. April 2019 version.
  3. ^ a b Lieske, E. & Myers, R.F. (2004). Coral reef guide – Red Sea. HarperCollins, London. ISBN 0-00-715986-2.
  4. ^ Fessler, Jennifer L.; Westneat, Mark W (2007). "Molecular phylogenetics of the butterflyfishes (Chaetodontidae): Taxonomy and biogeography of a global coral reef fish family". Molecular Phylogenetics and Evolution. 45 (1): 50–68. doi:10.1016/j.ympev.2007.05.018.
  5. ^ Hsu, Kui-Ching; Chen, Jeng-Ping & Shao, Kwang-Tsao (2007). "Molecular phylogeny of Chaetodon (Teleostei: Chaetodontidae) in the Indo-West Pacific: evolution in geminate species pairs and species groups" (PDF). Raffles Bulletin of Zoology Supplement. 14: 77–86. Archived from the original (PDF) on 2007-08-11. Retrieved 2008-09-02.

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Blackback butterflyfish: Brief Summary

provided by wikipedia EN

The black-backed butterflyfish or blackback butterflyfish (Chaetodon melannotus) is a species of butterflyfish (family Chaetodontidae). It is widespread through the Indo-Pacific area from the Red Sea and East Africa to Samoa, to southern Japan and throughout Micronesia.

This fish grows up to 18 cm (ca. 7 in) long, and may live for up to 20 years. When observed at night or when frightened, this species changes color; the dorsal portion of the body turns black except for two white patches.

It belongs to the large subgenus Rabdophorus which might warrant recognition as a distinct genus. In this group, it appears a close relative of the spot-tailed butterflyfish (C. ocellicaudus) and somewhat less close to the yellow-dotted butterflyfish (C. selene). These are all of oval shape, silvery with yellow fins and snout, ascending diagonal stripes, and black markings around the eyes, on the caudal peduncle, and sometimes on the back. Next closest seem the saddle butterflyfish (C. ephippium) and the dotted butterflyfish (C. semeion), but these are already so distant that their ancestors must have diverged from those soon after the Rabdophorus lineage started to diversify.

These oviparous fish are common on staghorn coral thickets, they are less seen on exposed parts of reefs. Black-backed butterflyfish are generally found between 4 and 20 m deep, usually solitary, in pairs during the breeding season. Juveniles are more commonly found inshore, in pairs or traveling in small groups. It feeds primarily on the polyps of soft and hard corals. The Black-backed Butterflyfish is easy to maintain in the aquarium by the standards of its genus.

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