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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]
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.
The eastern subspecies, F. d. diaphanus, can be differentiated from the western subspecies, F. d. menona, by the presence of a further anterior dorsal fin position, increased number of anterior bars in the males of the subspecies (9–15 compared to 5-0 for F. d. menona) with more intense bars along the side that stay intact along the anterior ...
In both of the caudal and dorsal fins, these more well-spaced areas are more flexible than the tightly-packed regions. The anal fin of Aesopichthys is triangular in shape and is made up of an average of 18.5 rays with all but the first 2-3 being articulated. Most of the rays behind these are tightly packed with the last 5-6 being more spaced ...
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 of common fish in each order can be found at Actinopterygii
In Fundulus olivaceus, the gill slit extends the dorsal to the uppermost pectoral fin ray. The distance from the origin of the dorsal fin to the end of the hypural plate is less than the distance from the origin of the dorsal fin to the preopercle or occasionally about equal to that distance. [4] The mouth is sightly supraterminal. [5]
Neopterygii (from Greek νέος neos 'new' and πτέρυξ pteryx 'fin') is a subclass of ray-finned fish (Actinopterygii). Neopterygii includes the Holostei and the Teleostei, of which the latter comprise the vast majority of extant fishes, and over half of all living vertebrate species. [2]
Anal fin origin under or slightly behind base of last dorsal fin ray. [8] The mineralized tissue of its scale is made up of hydroxylapatite, and its mineralized skeleton is composed of apatite. The snout of the glassy sprat is pointed and becomes rounded with growth but is initially dorso-ventrally flattened, and its mouth reaches the anterior ...