dcsimg

Diagnostic Description

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Plain brown or olivaceous in color, paler below; subadults with black caudal rays, narrow margins and white caudal filaments; pectoral fins with white distal margins (Ref. 3145).Description: Characterized further by adults having long, tapering horn on forehead; pair of bony plates on caudal peduncle that develop knife-like keels in adults; juveniles and subadult with white ring around caudal peduncle (Ref. 90102).
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Recorder
Cristina V. Garilao
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Life Cycle

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Spawn in pairs (Ref. 240).
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Susan M. Luna
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Morphology

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Dorsal spines (total): 5; Dorsal soft rays (total): 28 - 29; Analspines: 2; Analsoft rays: 27 - 28
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Cristina V. Garilao
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Trophic Strategy

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Juveniles occur in clear, shallow lagoon reefs at depths as little as 1 m; adults rarely seen in less than 25 m, encountered off outer reef drop-offs in small schools. Feed on large zooplankton during the day and shelter within the reef during the night; also feed on benthic algae (Ref. 30573, 48637).
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Pascualita Sa-a
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Biology

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Juveniles occur in clear, shallow lagoon reefs at depths as little as 1 m; adults rarely seen in less than 25 m, encountered off outer reef drop-offs in small schools (Ref. 30573, 48637). Benthopelagic (Ref. 58302). Feeds on large zooplankton during the day and shelter within the reef during the night; also benthic algae (Ref. 30573, 48637).
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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

provided by The Fish Database of Taiwan
廣泛分布於印度-太平洋水域,西起非洲東部,東至土木土群島,北至日本,南至羅得豪。台灣目前除西部海域外,其餘各地海域及離島礁岸均有記錄。
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臺灣魚類資料庫
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臺灣魚類資料庫

利用

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一般以流刺網、延繩釣或潛水鏢魚法等捕獲。觀賞及食用兼具。剝皮後,煮薑絲湯,肉質鮮美。尾柄上骨質盾板非常銳利,易傷人,處理時需小心。
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描述

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體呈橢圓形而側扁;尾柄部有二個盾狀骨板,各有一個龍骨突。頭小,隨著成長,在眼前方之額部逐漸突出而形成長而鈍圓之角狀突起,角狀突起與吻部呈60°角。口小,端位,上下頜各具一列齒,齒稍側扁且尖銳,兩側或有鋸狀齒。背鰭及臀鰭硬棘尖銳,分別具V棘及II棘,各鰭條皆不延長;尾鰭截平,上下葉緣微延長。體呈橄欖色至暗褐色,鰓膜白色,體側無任何斑紋;背鰭基部有一灰帶,背鰭與臀鰭軟條部有數條縱線紋;尾柄與腹鰭緣白色,成魚消失。
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棲地

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棲息於潟湖和礁區海域,棲息深度在1-60公尺左右,幼魚則常出現於潮池。主要集聚成小群於白天捕食浮游動物或底藻,夜間則躲藏於礁石間。
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Whitemargin unicornfish

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The whitemargin unicornfish (Naso annulatus) is a tropical fish found throughout the Indo-Pacific.[2] It can reach a length of 100 cm, making it one of the largest members of the family Acanthuridae. The species itself exists beyond the Pakistan coast, it can be found throughout different regions of the ocean, including Hawai’i and the Red Sea[3]

Description

Naso annulatus also known as Whitemargin unicorn fish are one of many surgeon fish in the sea.[4] The species normally range from a brownish-white color to grey/olive in color.[5] They can be distinguished by the sharp cone like-shap "nasal" protruding out of their foreahead.[6] The tail is black surrounded by a white margin. It is often found in large schools off tropical reefs, and it feeds on zooplankton. The fish has two scutes on the left side. These are found on the caudal peduncle near the tail.

Habitat and biology

White-margin Unicorn fish can be located in the shallow parts of the ocean, such as the coral reefs. It can be found in the Red Sea, Indo-pacific ocean, and Hawai'i.[7] It feeds on zooplankton, as well as plants like Algae.[8] The fish has two scutes on the left side. These are found on the caudal peduncle near the tail.

References

  1. ^ Abesamis, R.; Clements, K.D.; Choat, J.H.; McIlwain, J.; Myers, R.; Nanola, C.; Rocha, L.A.; Russell, B.; Stockwell, B. (2012). "Naso annulatus". IUCN Red List of Threatened Species. 2012: e.T177988A1512439. doi:10.2305/IUCN.UK.2012.RLTS.T177988A1512439.en. Retrieved 18 November 2021.
  2. ^ Froese, Rainer; Pauly, Daniel (eds.) (2006). "Naso annulatus" in FishBase. 12 2006 version.
  3. ^ Nalley, Eileen M.; Donahue, Megan J.; Heenan, Adel; Toonen, Robert J. (January 2022). "Quantifying the diet diversity of herbivorous coral reef fishes using systematic review and DNA metabarcoding". Environmental DNA. 4 (1): 191–205. doi:10.1002/edn3.247. ISSN 2637-4943. S2CID 238726107.
  4. ^ "Family Acanthuridae, Surgeonfishes, Page 1". www.marinelifephotography.com. Retrieved 2022-12-12.
  5. ^ "Shorefishes - The Fishes - Species". biogeodb.stri.si.edu. Retrieved 2022-12-12.
  6. ^ "Family Acanthuridae, Surgeonfishes, Page 1". www.marinelifephotography.com. Retrieved 2022-12-12.
  7. ^ Nalley, Eileen M.; Donahue, Megan J.; Heenan, Adel; Toonen, Robert J. (January 2022). "Quantifying the diet diversity of herbivorous coral reef fishes using systematic review and DNA metabarcoding". Environmental DNA. 4 (1): 191–205. doi:10.1002/edn3.247. ISSN 2637-4943. S2CID 238726107.
  8. ^ Nalley, Eileen M.; Donahue, Megan J.; Heenan, Adel; Toonen, Robert J. (January 2022). "Quantifying the diet diversity of herbivorous coral reef fishes using systematic review and DNA metabarcoding". Environmental DNA. 4 (1): 191–205. doi:10.1002/edn3.247. ISSN 2637-4943. S2CID 238726107.
Wikispecies has information related to Naso annulatus.
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Whitemargin unicornfish: Brief Summary

provided by wikipedia EN

The whitemargin unicornfish (Naso annulatus) is a tropical fish found throughout the Indo-Pacific. It can reach a length of 100 cm, making it one of the largest members of the family Acanthuridae. The species itself exists beyond the Pakistan coast, it can be found throughout different regions of the ocean, including Hawai’i and the Red Sea

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Description

provided by World Register of Marine Species
Juveniles occur in clear, shallow lagoon reefs at depths as little as 1 m; adults rarely seen in less than 25 m, encountered off outer reef dropoffs in small schools. Feeds on large zooplankton during the day and shelter within the reef during the night.

Reference

Froese, R. & D. Pauly (Editors). (2023). FishBase. World Wide Web electronic publication. version (02/2023).

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