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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]
Fisch, Rhineland-Palatinate, a municipality in Trier-Saarburg, Germany; Fisch (surname), a German surname; Fisch, botanical identifier for Friedrich Ernst Ludwig von Fischer; Fisch, a popular Roblox fishing simulator
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 65 extinct fish species, 87 possibly extinct fish species, and six extinct in the wild fish species. [ 1 ] [ 2 ] Cartilaginous fish
WikiProject Fishes aims to help organise our rapidly growing collection of articles about fish taxa.Issues outside the scope of this WikiProject include fishkeeping (fish aquarium topics), fishing, fisheries, fish cuisine topics, fish farm topics, fish market topics, fish processing topics, fish product sales topics, fish products topics, and fish trap topics.
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Chimaeras [1] are cartilaginous fish in the order Chimaeriformes (/ k ɪ ˈ m ɛ r ɪ f ɔːr m iː z /), known informally as ghost sharks, rat fish (not to be confused with rattails), spookfish, or rabbit fish; the last two names are also applied to Opisthoproctidae and Siganidae, respectively.
Leiopelma auroraensis, known as the Aurora frog, is an extinct species of frog that was found in New Zealand. [1] One subfossil of the Aurora frog has been discovered in the Aurora Cave, Fiordland, New Zealand. It measured about 60 mm from the snout to the vent. It is named after the Aurora Cave for where it was found. [3]
Polypterids are elongated fish with a unique series of dorsal finlets which vary in number from seven to 18, instead of a single dorsal fin.Each of the dorsal finlets has bifid (double-edged) tips, and are the only fins with spines; the rest of the fins are composed of soft rays.