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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 front nostril has a low rim which is larger to the rear. There is a forward pointing spine in front of the dorsal fin which is embedded in the nape. [6] Like all rabbitfishes, the dorsal fin has 13 spines and 10 soft rays while the anal fin has 7 spines and 9 soft rays. [2] The caudal fin is emarginate to weakly forked. [6]
Siganus insomnis is a deep-bodied species of rabbitfish which is told apart from other rabbitfishes by having the flanks (apart from possibly the belly and a narrow strip along the base of the spiny part of the dorsal fin) marked with horizontal, parallel bronze coloured lines which extend the whole length of the flank from the nape and gill slit to underneath the large yellow spot below the ...
The continuous dorsal fin has 10 spines and 11 soft rays, there is a deep incision between spiny and soft rayed parts of the fin and a tassel of cirri near tip of each spine. The anal fin has 3 spines and 6 soft rays> The caudal fin gently rounded and the pectoral fins do not extend as far as the tips of pelvic fins , The pectoral fin rays ...
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
Schistura scripta, is a species of ray-finned fish in the genus Schistura, newly identified from Sri Lanka.It is the third species of Schistura stone loach described from Sri Lanka, the other being the widely distributed native species Schistura notostigma and endemic Schistura madhavai.
Zebrasoma xanthurum has its dorsal fin supported by 5 spines and 24 or 25 soft rays while the anal fin is supported by 3 spines and 19 or 20 soft rays. [9] This species has a deep laterally compressed body, a protruding snout and high dorsal and anal fins. [10]