Acanthuridae

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Surgeonfish
Temporal range: Eocene–Recent
Acanthurussohal-ArabischerDoktor.jpg
Sohal surgeonfish, Acanthurus sohal. The orange mark on the tail peduncle shows where the spine is folded in.
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acanthuriformes
Suborder: Acanthuroidei
Family: Acanthuridae
Bonaparte, 1835 [1]
Genera

see text

The exposed spine of the surgeonfish species Acanthurus xanthopterus Acanthurus spine peduncle.jpg
The exposed spine of the surgeonfish species Acanthurus xanthopterus

Acanthuridae are a family of ray-finned fish which includes surgeonfishes, tangs, and unicornfishes . The family includes about 86 extant species of marine fish living in tropical seas, usually around coral reefs. Many of the species are brightly colored and popular in aquaria.

Contents

Etymology and taxonomic history

The name of the family is derived from the Greek words akantha and oura, which loosely translate to "thorn" and "tail", respectively. This refers to the distinguishing characteristic of the family, the "scalpel" found on the caudal peduncle. [2] In the early 1900s, the family was called Hepatidae. [3]

Subfamilies and genera

1865 watercolor of an Acanthurus by Jacques Burkhardt. Acanthurus MH-MCZArtwork ARC 209-030.jpg
1865 watercolor of an Acanthurus by Jacques Burkhardt.

Acanthuridae contains the following extant subfamilies and genera: [4] [1]

Evolution and fossil record

There are several extinct genera known from fossils dating from the Eocene to Miocene:

Eocene genera

Oligocene genera

Miocene genera

Morphology

The distinctive characteristic of the family is that they have scalpel-like modified scales, one or more on either side of the peduncle of the tail. [6] The spines are dangerously sharp and may seriously injure anyone who carelessly handles such a fish. The dorsal, anal, and caudal fins are large, extending for most of the length of the body. The mouths are small and have a single row of teeth adapted to grazing on algae. [2]

Surgeonfishes sometimes feed as solitary individuals, but they often travel and feed in schools. Feeding in schools may be a mechanism for overwhelming the highly aggressive defense responses of small territorial damselfishes that vigorously guard small patches of algae on coral reefs. [7] Most species are fairly small, with a maximum length of 15–40 cm (6–15.5 in), but some in the genus Acanthurus, some in the genus Prionurus, and most species in the genus Naso may grow larger; the whitemargin unicornfish (Naso annulatus) is the largest species in the family, reaching a length of up to 1 m (3 ft 3 in). These fishes may grow quickly in aquaria, so average growth size and suitability should be checked before adding them to any marine aquarium.

Acronurus stage of an unidentified Acanthurus near Morotai Post larval surgeonfish (Acanthurus sp.) (28822279247).jpg
Acronurus stage of an unidentified Acanthurus near Morotai

A larval acanthurid, known as an acronurus, looks strikingly different from the juvenile and adult forms of the same individual. It is mostly transparent and tends to have a pelagic lifestyle, living in open water for an extended period of time before settling on the ocean bottom near the shore, where it develops into the juvenile and ultimately the adult form. [8]

Symbiotic bacteria

Acanthurids are the only known hosts of the bacteria of the genus Epulopiscium bacteria. These bacteria affect the digestion of surgeonfishes enabling them to digest the algae in their diet. [9] [10] [11]

In the aquarium

Tangs are very sensitive to disease in the home aquarium. However, if the tang is fed enough algae and the aquarium is properly maintained disease should not be a problem. It is usually necessary to quarantine the animals for a period before introducing them to the aquarium.

Adults range from 15 to 40 centimetres (5.9 to 15.7 in) in length and most grow quickly even in aquaria. When considering a tang for an aquarium it is important to consider the size to which these fish can grow. Larger species such as the popular Pacific blue tang surgeonfish (of Finding Nemo fame), Naso or lipstick tang, lined surgeonfish, Sohal surgeonfish and Atlantic blue tang surgeonfish can grow to 40 cm (16 in) and require swimming room and hiding places.

Many also suggest adding aggressive tangs to the aquarium last as they are territorial and may fight and possibly kill other fish.

Tangs primarily graze on macroalgae from genera such as Caulerpa and Gracilaria , although they have been observed in an aquarium setting to eat meat-based fish foods. A popular technique for aquarists, is to grow macroalgae in a sump or refugium. This technique not only is economically beneficial, but serves to promote enhanced water quality through nitrate absorption. The growth of the algae can then be controlled by feeding it to the tang.


Related Research Articles

<span class="mw-page-title-main">Yellow tang</span> Species of fish

The yellow tang, also known as the lemon sailfin, yellow sailfin tang or somber surgeonfish, is a species of marine ray-finned fish belonging to the family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. It is one of the most popular marine aquarium fish. It is bright yellow in color, and it lives in reefs. The yellow tang spawn around a full moon. The yellow tang eats algae. The yellow tang has a white barb, located just before the tail fin, to protect itself.

<i>Zebrasoma</i> Genus of fishes

Zebrasoma is a genus of marine ray-finned fishes belonging to the family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. These fishes are found in the Indo-Pacific region.

<i>Acanthurus</i> Genus of fishes

Acanthurus is a genus of marine ray-finned fish belonging to the family Acanthuridae, which includes the surgeonfishes, unicornfishes and tangs, found in the Atlantic, Indian and Pacific Ocean. They are found in tropical oceans, especially near coral reefs, with most species in the Indo-Pacific but a few are found in the Atlantic Ocean. As other members of the family, they have a pair of spines, one on either side of the base of the tail which are dangerously sharp.

<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.

<i>Zebrasoma desjardinii</i> Species of fish

Zebrasoma desjardinii, the Red Sea sailfin tang, Desjardin's sailfin tang, Indian sailfin tang or Indian sailfin surgeonfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This fish is found in the Indian Ocean.

<span class="mw-page-title-main">Sohal surgeonfish</span> Species of fish

The sohal surgeonfish or sohal tang, is a species of marine ray-finned fish belonging to the family Acanthuridae, which includes the surgeonfishes, unicornfishes and tangs. This fish is found in the northwestern Indian Ocean.

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

Acanthurus leucosternon, commonly known as the blue surgeonfish, powder blue tang or powder-blue surgeonfish, 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 Ocean.

<i>Ctenochaetus</i> Genus of fishes

Ctenochaetus, or bristletooth tangs, is a genus of marine ray-finned fish belonging to the family Acanthuridae, which includes the surgeonfishes, unicornfishes and tangs. These fishes are found in the Indo-Pacific region. They have many, small flexible teeth and some species have the common name bristletooth.

<i>Zebrasoma rostratum</i> Species of fish

Zebrasoma rostratum, the longnose surgeonfish, longnose tang or black tang, is a species of marine ray-finned fish belonging to the family Acanthuridae, which includes the surgeonfishes, unicornfishes and tangs. This fish is found in the western central Pacific Ocean.

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

Acanthurus olivaceus, the orange-band surgeonfish, the orange-shoulder surgeonfish or the orangebar tang, is a species of marine ray-finned fish belonging to the family Acanthuridae, this family includes the surgeonfishes, unicornfishes and tangs. It lives in the tropical waters of the Indo-west Pacific.

<i>Zebrasoma scopas</i> Species of fish

Zebrasoma scopas, the brown tang, twotone tang, scopas tang or brush-tail tang, is a species of marine ray-finned fish belonging to the family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. The brown tang is found throughout Oceania and is a herbivorous fish, feeding predominantly on filamentous algae. It is a highly popular fish in the aquarium trade.

<span class="mw-page-title-main">Sailfin tang</span> Species of fish

The sailfin tang, the Pacific sailfin tang, purple sailfinned tang or sailfin surgeonfish, is a marine ray-finned fish belonging to the family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. This fish is found in the Pacific Ocean and is popular in the aquarium hobby.

<i>Zebrasoma xanthurum</i> Species of fish

Zebrasoma xanthurum, the purple tang or yellowtail tang, is a species of marine ray-finned fish belonging to the family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. This species is endemic to the north western Indian Ocean.

<i>Ctenochaetus strigosus</i> Species of fish

Ctenochaetus strigosus, the kole tang, spotted bristletooth, spotted surgeonfish, goldring bristletooth, goldring surgeonfish, yelloweye tang or yellow-eyed surgeonfish, is a species of marine ray-finned fish belonging to family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. This fish is endemic to Hawaii.

<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.

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

The bluespine unicornfish, also known as the short-nose 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. It is occasionally found in the aquarium trade. It grows to a size of 70 cm in length. It is called kala ('thorn') in Hawaii, dawa in New Caledonia, and ta or tā in Fiji.

<i>Ctenochaetus hawaiiensis</i> Species of fish

Ctenochaetus hawaiiensis thechevron tang, black surgeonfish, Hawaiian bristletooth, Hawaiian kole or Hawaiian surgeonfish is a species of marine ray-finned fish belonging to the family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. This fish is found in the tropical Pacific Ocean.

<i>Ctenochaetus marginatus</i> Species of fish

Ctenochaetus marginatus, the blue-spotted bristletooth, blue-spotted surgeonfish or striped-fin surgeonfish, is a species of marine ray-finned fish belonging to the biology Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. The blue-spotted bristletooth is found in the central and eastern Pacific Ocean.

<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.

<span class="mw-page-title-main">Acanthurinae</span> Subfamily of fishes

Acanthurinae is a subfamily of marine ray-finned fishes belonging to the family Acanthuridae, found in the Indo-Pacific and the tropical Atlantic. These fishes commonly have the English names surgeonfishes or tangs.

References

  1. 1 2 Richard van der Laan; William N. Eschmeyer & Ronald Fricke (2014). "Family-group names of recent fishes". Zootaxa. 3882 (2): 1–230. doi: 10.11646/zootaxa.3882.1.1 . PMID   25543675.
  2. 1 2 Froese, Rainer; Pauly, Daniel (eds.). "Family Acanthuridae". FishBase . February 2007 version.
  3. ↑ Seale, Alvin (1909). "New Species of Philippine Fishes". Philippine Journal of Science. 4 (6). Bureau of Science in Manila. doi: 10.5962/bhl.title.54135 .
  4. ↑ 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. Archived from the original on 2019-04-08. Retrieved 2023-07-10.
  5. ↑ Samuel Hubbard Scudder (1884). "Nomenclator Zoologicus: An Alphabetical List of All Generic Names that Have Been Employed by Naturalists for Recent and Fossil Animals from the Earliest Times to the Close of the Year 1879". Bulletin of the United States National Museum (19).
  6. ↑ Sorenson, L., Santini, F., Carnevale, G. and Alfaro, M.E. (2013) "A multi-locus timetree of surgeonfishes (Acanthuridae, Percomorpha), with revised family taxonomy". Molecular phylogenetics and evolution, 68(1): 150–160. doi : 10.1016/j.ympev.2013.03.014
  7. ↑ W. S. Alevizon (1976). "Mixed schooling and its possible significance in a tropical western Atlantic parrotfish and surgeonfish". Copeia . 1976 (4): 797–798. doi:10.2307/1443464. JSTOR   1443464.
  8. ↑ Jonna, R. Jamil. "Acanthuridae (Surgeonfishes, tangs, unicornfishes)". Animal Diversity Web. Retrieved 2024-04-20.
  9. ↑ Miyake, Sou; Ngugi, David Kamanda; Stingl, Ulrich (2015). "Diet strongly influences the gut microbiota of surgeonfishes". Molecular Ecology. 24 (3): 656–672. doi:10.1111/mec.13050. ISSN   1365-294X. PMID   25533191. S2CID   206181801.
  10. ↑ Fishelson, L. (1999-03-01). "Polymorphism in gigantobacterial symbionts in the guts of surgeonfish (Acanthuridae: Teleostei)". Marine Biology. 133 (2): 345–351. doi:10.1007/s002270050473. ISSN   1432-1793. S2CID   84816281.
  11. ↑ Pollak, Peggy E.; Montgomery, W. Linn (1994-08-01). "Giant bacterium (Epulopiscium fishelsoni ) influences digestive enzyme activity of an herbivorous surgeonfish (Acanthurus nigrofuscus)". Comparative Biochemistry and Physiology Part A: Physiology. 108 (4): 657–662. doi:10.1016/0300-9629(94)90352-2. ISSN   0300-9629.
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