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Fishes are a paraphyletic group and for this reason, the class Pisces seen in older reference works is no longer used in formal taxonomy.Traditional classification divides fish into three extant classes (Agnatha, Chondrichthyes, and Osteichthyes), and with extinct forms sometimes classified within those groups, sometimes as their own classes: [1]
Catalog of Fishes is a comprehensive on-line database and reference work on the scientific names of fish species and genera. It is global in its scope and is hosted by the California Academy of Sciences. It has been compiled and is continuously updated by the curator emeritus of the CAS fish collection, William N. Eschmeyer.
Fishes of the World is a standard reference for the systematics of fishes.It was first written in 1976 by the American ichthyologist Joseph S. Nelson (1937–2011). Now in its fifth edition (2016), the work is a comprehensive overview of the diversity and classification of the 30,000-plus fish species known to science.
The vast majority of extant fish are members of Osteichthyes, being an extremely diverse and abundant group consisting of 45 orders, over 435 families and 28,000 species. [3] It is the largest class of vertebrates in existence today, encompassing most aquatic vertebrates, as well as all semi-aquatic and terrestrial vertebrates.
Ostariophysi is the second-largest superorder of fish.Members of this superorder are called ostariophysians.This diverse group contains 10,758 species, about 28% of known fish species in the world and 68% of freshwater species, and are present on all continents except Antarctica.
Beloniformes / ˈ b ɛ l ə n ɪ m ɪ f ɔːr m iː z / is an order composed of six families (and about 264 species) of freshwater and marine ray-finned fish: Adrianichthyidae (ricefish and medakas) Belonidae (needlefish) Exocoetidae (flyingfishes) Hemiramphidae (halfbeaks) Scomberesocidae (sauries) Zenarchopteridae (viviparous halfbeaks) [2]
Labriformes is an order of ray-finned fishes which includes the wrasses, cales and parrotfishes, within the clade Percomorpha. [3] Some authors include the Labriformes as the clade Labroidei within the Perciformes while others include more families within the Labriformes, such as the cichlids and damselfishes, but the 5th edition of Fishes of the World includes just three listed in the section ...
Fish of this family are important as food in several regions, and also constitute a large percentage of captive freshwater aquarium fish species. [3] These fish vary in length; many are less than 3 cm (1.2 in). One of the smallest species, Hyphessobrycon roseus, grows to a maximum length of 1.9 cm. [4] These fish inhabit a wide range and ...