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This category contains articles about taxa at the order level in the class Actinopterygii, the ray-finned fishes. The ray-finned fishes contain most of the species of fish and these are divided into 46 orders. Most of the fishes known to aquarists and anglers are within this class. **Subcategories are listed below for all 46 orders and examples ...
Actinopterygii (/ ˌ æ k t ɪ n ɒ p t ə ˈ r ɪ dʒ i aɪ /; from Ancient Greek ἀκτίς (aktis) 'having rays' and πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish [2] that comprise over 50% of living vertebrate species. [3]
The mineral texture of alligator gar scales consists of bundles of cross-plied hydroxyapatite minerals oriented towards the scale's surface. Ganoine or ganoin is a glassy, often multi-layered mineralized tissue that covers the scales , cranial bones and fin rays in some non-teleost ray-finned fishes , [ 1 ] such as gars and bichirs , as well as ...
Acanthopterygii (meaning "spiny-finned one") is a superorder of bony fishes in the class Actinopterygii.Members of this superorder are sometimes called ray-finned fishes for the characteristic sharp, bony rays in their fins; however this name is often given to the class Actinopterygii as a whole.
Their mouths open in the terminal position, they have diamond-shaped scales, and each scale is outlined with black pigment. Breeding males become heavily pigmented and steel bluish in color during late spring and early summer , and they have ventral fins that also become dull yellow to bright yellow.
Ganoine is an ancient feature of ray-finned fishes, being found for example on the scales of stem group actinopteryigian Cheirolepis. [17] While often considered a synapomorphic character of ray-finned fishes, ganoine or ganoine-like tissues are also found on the extinct acanthodii . [ 17 ]
Clupeiformes / ˈ k l uː p iː ɪ f ɔːr m iː z / is the order of ray-finned fish that includes the herring family, Clupeidae, and the anchovy family, Engraulidae and sardines. The group includes many of the most important forage and food fish. Clupeiformes are physostomes, which means that their gas bladder has a pneumatic duct connecting ...
Ophidiiformes / ɒ ˈ f ɪ d i. ɪ f ɔːr m iː z / is an order of ray-finned fish that includes the cusk-eels (family Ophidiidae), pearlfishes (family Carapidae), viviparous brotulas (family Bythitidae), and others.
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