Naso thynnoides

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Naso thynnoides
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Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acanthuriformes
Family: Acanthuridae
Genus: Naso
Subgenus: Axinurus
Species:
N. thynnoides
Binomial name
Naso thynnoides
(Cuvier, 1829)
Synonyms [2]
  • Axinurus thynnoidesCuvier, 1829

Naso thynnoides, the oneknife unicornfish, oneknife unicorn, thunny unicornfish, singlespine unicornfish, one-spine unicorn, or barred unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the Indo-Pacific.

Contents

Taxonomy

Naso thynnoides was first formally described in 1829 as Axinurus thynnoides by the French zoologist Georges Cuvier with its type locality given as Dorey Harbour in Papua New Guinea. [3] This species is classified in the subgenus Axinurus within the genus Naso . [4] The genus Naso is the only genus in the subfamily Nasinae in the family Acanthuridae. [5]

Etymology

Naso thynnoides has the specific name thynnoides, which means "tuna-like" which Achille Valenciennes explained in 1835 was an allusion to the more elongated and compressed body of this species, like that of a tuna. [4]

Description

Naso thynnoides has its dorsal fin supported by 5 or 6 spines and 28 to 30 soft rays while the anal fin is supported by 2 spines and between 28 and 30 soft rays. This is a relatively slender unicornfish with the standard length being around three times the body's depth. The head does not have any form of protuberance and is smoothly rounded. There is a short, diagonal groove in front of the eye and below the nostrils. There is a single bony plate on each side of the caudal peduncle and this has a small, semicircular keel. The overall colour is grey fading on the underside. There are around 30 bluish horizontal stripes along the back and flanks, breaking into irregular shaped spots on the head. There is an indistinct yellowish horizontal stripe along the flanks. The bony plates and keels on the caudal peduncle are dusky and the caudal fin is bluish grey. [6] This species has a maximum published fork length of 40 cm (16 in). [2]

Distribution and habitat

Naso thynnoides is found across the Indian Ocean and into the Pacific Ocean. In the Indian Ocean it is found along the eastern coast of Africa from Kenya south to Mozambique, the Comoro Islands, Madagascar, Seychelles, Mascarene Islands, the Maldives, Sri Lanka, Nicobar Islands, Andaman Islands and the Andaman Sea coasts of Myanmar, Thailand and Malaysia through the Malay Archipelago into the Pacific north to the Ryukyu Islands, east to the American Samoa, Johnston Atoll and Tuamoto islands and south to the Great Barrier Reef. [1] This fish is found on steep outward reef and lagoon slopes at depths of between 2 and 40 m (6 ft 7 in and 131 ft 3 in) [2]

Biology

Naso thynnoides feeds on zooplankton and is typically found in small schools. They are diurnal and at night they sleep on the reef, changing colour to adopt a disruptive camouflage. They also visit the reef to be cleaned by cleaner wrasse of the genus Labroides [2] [1]

Related Research Articles

<i>Naso</i> (fish) Genus of fishes

Naso is a genus of marine ray-finned fishes belonging to the family, Acanthuridae, the unicornfishes, surgeonfishes and tangs. The fishes in this genus are known commonly as unicornfishes because of the "rostral protuberance", a hornlike extension of the forehead present in some species. Unicorn fish are popular with spearfishermen and may be cooked by grilling them whole. Unicornfish primarily live around coral reefs and eat mostly algae. It is very popular in Maldives.

<span class="mw-page-title-main">Yellowspotted sawtail</span> Species of fish

The yellowspotted sawtail, or spotted sawtail, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This fish is found in the southwest Pacific Ocean.

<i>Naso vlamingii</i> Species of fish

Naso vlamingii, the bignose unicornfish, scibbled unicornfish, Vlaming's unicornfish, and zebra unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the Indo-Pacific.

<i>Acanthurus achilles</i> Species of fish

Acanthurus achilles, the Achilles tang, redtail surgeonfish or redspot surgeonfish, is a marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This fish is found in the Pacific Ocean.

<span class="mw-page-title-main">Whitemargin unicornfish</span> Species of fish

The whitemargin unicornfish, also known as the ringtailed unicornfish or short-horned unicorn-fish, 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.

<i>Naso brevirostris</i> Species of fish

Naso brevirostris, also known as the short-nosed unicornfish, spotted unicornfish, brown unicornfish, lined unicornfish, longnose surgeonfish, palefin unicornfish, paletail unicornfish, shorthorned unicornfish or shortsnouted unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. It occurs in the Indian and western Pacific Oceans.

<i>Naso brachycentron</i> Species of fish

Naso brachycentron, the humpback unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the Indian and western Pacific Oceans.

<i>Naso lituratus</i> Species of fish

Naso lituratus, the clown unicornfish, orangespined unicornfish, black-finned unicornfish, Pacific orangespined unicornfish, blackfinned unicornfish or stripefaced unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This fish is found in the eastern Indian Ocean and western Pacific Ocean.

<i>Naso lopezi</i> Species of fish

Naso lopezi, the elongated unicornfish, slender unicornfish or Lopez' unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeon fishes, unicornfishes and tangs. This species is found in the western Pacific Ocean.

<span class="mw-page-title-main">Bluetail unicornfish</span> Species of fish

The bluetail unicornfish, also known as the blue unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the western central Pacific Ocean.

<i>Naso caesius</i> Species of fish

Naso caesius, the grey unicornfish or silverblotched unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species occurs in the Indo-Pacific region.

<i>Naso elegans</i> Species of fish

Naso elegans, the elegant unicornfish, the blonde naso tang, Indian orange-spine unicorn, lipstick surgeonfish, lipstick tang, orangespine unicornfish or smoothheaded unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the Indian and western Pacific Oceans.

<i>Naso fageni</i> Species of fish

Naso fageni, the horseface unicornfish or blunt unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This fish is found in the Indo-Pacific region.

<span class="mw-page-title-main">Sleek unicornfish</span> Species of fish

The sleek unicornfish, also known as the blue-tail unicorn, Thorpe's unicornfish, blacktongue unicornfish or ʻopelu kala, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in coral reefs in the Pacific and Indian Oceans. It is of value in commercial fisheries and as a gamefish, and is also seen in aquaria.

Naso maculatus, the scribbled unicornfish or spotted unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This fish is found in the western Pacific Ocean.

<span class="mw-page-title-main">Squarenose unicornfish</span> Species of fish

The squarenose unicornfish is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the Indo-Pacific region.

<i>Naso minor</i> Species of fish

Naso minor, the blackspine unicornfish, slender unicornfish, lesser unicornfish or pony unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the Indo-Pacific region.

<span class="mw-page-title-main">Reticulate unicornfish</span> Species of fish

The reticulate unicornfishes is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. It is a rare species found on coral reefs in the Indo-West Pacific region.

<i>Naso tonganus</i> Species of surgeonfish

Naso tonganus, the bulbnose unicornfish, hump-nosed unicornfish, humphead unicornfish, or the humpnose unicorn, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the Indo-Pacific. It is of value in commercial fisheries.

<i>Naso tuberosus</i> Species of fish

Naso tuberosus, the humpnose unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species occurs in the Indian Ocean but it may be more widespread.

References

  1. 1 2 3 Abesamis, R.; Clements, K.D.; Choat, J.H.; et al. (2012). "Naso thynnoides". IUCN Red List of Threatened Species . 2012: e.T177980A1509761. doi: 10.2305/IUCN.UK.2012.RLTS.T177980A1509761.en .
  2. 1 2 3 4 Froese, Rainer; Pauly, Daniel (eds.) (2023). "Naso thynnoides" in FishBase. June 2023 version.
  3. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Naso". Catalog of Fishes . California Academy of Sciences . Retrieved 1 August 2023.
  4. 1 2 Christopher Scharpf & Kenneth J. Lazara, eds. (12 January 2021). "Order ACANTHURIFORMES (part 2): Families EPHIPPIDAE, LEIOGNATHIDAE, SCATOPHAGIDAE, ANTIGONIIDAE, SIGANIDAE, CAPROIDAE, LUVARIDAE, ZANCLIDAE and ACANTHURIDAE". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 31 July 2023.
  5. ↑ J. S. Nelson; T. C. Grande; M. V. H. Wilson (2016). Fishes of the World (5th ed.). Wiley. pp. 497–502. ISBN   978-1-118-34233-6.
  6. ↑ John E. Randall (2022). "Family Acanthuridae". In Phillip C Heemstra; Elaine Heemstra; David A Ebert; Wouter Holleman; John E Randall (eds.). Coastal Fishes of the Western Indian Ocean (PDF). Vol. 5. South African Institute for Aquatic Biodiversity. pp. 219–244. ISBN   978-1-990951-32-9. Archived (PDF) from the original on 2023-06-12. Retrieved 2023-07-17.
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