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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]
Most species inhabit shallow, coastal waters, but a few are known from the open ocean, especially in association with sargassum mats. They are characterised by their elongated snouts, fused jaws, the absence of pelvic fins , and by thick plates of bony armour covering their bodies.
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.
Common names of fish can refer to a single species; to an entire group of species, such as a genus or family; or to multiple unrelated species or groups. Ambiguous common names are accompanied by their possible meanings. Scientific names for individual species and higher taxa are included in parentheses.
The ninespine stickleback is a euryhaline and eurythermal species of teleost fish, occupying both freshwater and marine habitats in higher latitudes of the world. Recently, this species has been under great examination due to pond populations' adaptations of morphology, life history, and behavior which separates them from their marine ...
The ocean triggerfish is a common food species in several areas, including the Caribbean and the island of Madeira. It is not commonly targeted by fisheries in the Western Atlantic. [ 1 ] The abundance of this species varies from year to year in the Canary Islands, with some fisheries reporting more than 300 kg caught in a single day.
Under this classification system, Osteichthyes was considered paraphyletic with regard to land vertebrates, as the common ancestor of all osteichthyans includes tetrapods amongst its descendants. While the largest subclass, Actinopterygii (ray-finned fish), is monophyletic, with the inclusion of the smaller sub-class Sarcopterygii, Osteichthyes ...
This classification follows Eastman and Eakin, 2000 [2] and includes references to additional classified species. [22] [23] Most species are restricted to the vicinity of Antarctica. Genus †Mesetaichthys Bieńkowska-Wasiluk, Bonde, Møller & Gaździcki, 2013 (Eocene of Seymour Island) [5] Family Bovichtidae Gill, 1862 [24] Genus Bovichtus ...