Perciformes

Perciformes, also called the Percomorpha or Acanthopteri, is an order or superorder of ray-finned fish. If considered a single order, they are the most numerous order of vertebrates, containing about 41% of all bony fish. Perciformes means "perch-like". This group comprises over 10,000 species found in almost all aquatic ecosystems.

Perciformes
Temporal range: Late Cretaceous–recent
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Superorder: Acanthopterygii
Order: Perciformes
Bleeker, 1863
Type species
Perca fluviatilis
Orders

See text

The order contains about 160 families, which is the most of any order within the vertebrates.[1] It is also the most variably sized order of vertebrates, ranging from the 7-mm (1/4-in) Schindleria brevipinguis to the 5-m (16.4 ft) marlin in the genus Makaira. They first appeared and diversified in the Late Cretaceous.

Among the well-known members of this group are perch and darters (Percidae), sea bass and groupers (Serranidae).[2]

Characteristics

The dorsal and anal fins are divided into anterior spiny and posterior soft-rayed portions, which may be partially or completely separated. The pelvic fins usually have one spine and up to five soft rays, positioned unusually far forward under the chin or under the belly. Scales are usually ctenoid (rough to the touch), although sometimes they are cycloid (smooth to the touch) or otherwise modified.

Taxonomy

Classification of this group is controversial. As traditionally defined before the introduction of cladistics, the Perciformes are almost certainly paraphyletic. Other orders that should possibly be included as suborders are the Scorpaeniformes, Tetraodontiformes, and Pleuronectiformes. Of the presently recognized suborders, several may be paraphyletic, as well. These are grouped by suborder/superfamily, generally following the text Fishes of the World.[1][3][4][5]

Perciformes display at the National Museum of Natural History.
Pomacanthus semicirculatus
Nelson 2015[5] Betancur-Rodriguez et al. 2016[6]
gollark: Yes, something something just world fallacy.
gollark: I don't think this matches any common definition of standards or values. Also, "human values" are somewhat thought up by humans, or at least made precise by human thinking. Also, nature contains plenty of horrible things.
gollark: It's basically the same thing as the standards you just complained about.
gollark: What?
gollark: If you have a universe entirely without human values, it isn't going to be pleasantly alien and diverse or something, but just horrible and/or boring to us.

References
  1. Nelson, J. S. (2006). Fishes of the World (4 ed.). Hoboken, NJ: John Wiley & Sons. ISBN 978-0-471-25031-9.
  2. "Perciform - Form and function". Encyclopedia Britannica. Retrieved 14 February 2019.
  3. Froese, Rainer, and Daniel Pauly, eds. (2015). "Perciformes" in FishBase. August 2015 version.
  4. "ADW: Perciformes". animaldiversity.ummz.umich.edu. Animal Diversity Web.
  5. J. S. Nelson; T. C. Grande; M. V. H. Wilson (2016). Fishes of the World (5th ed.). Wiley. pp. 430–467. ISBN 978-1-118-34233-6.
  6. R. Betancur-Rodriguez, E. Wiley, N. Bailly, A. Acero, M. Miya, G. Lecointre, G. Ortí: Phylogenetic Classification of Bony Fishes – Version 4 (2016)


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