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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]
The big-scale pomfret (Taractichthys longipinnis) also known as the long-finned bream, is a species of marine ray-finned fish, a pomfret of the family Bramidae. It is found in the Atlantic ocean, at depths down to 500 metres (1,600 ft). This species is widely distributed in the Pacific, from temperate zones throughout the tropics.
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.
Redfieldiiformes is an extinct order of ray-finned fish (actinopterygians) which lived from the Early Triassic to Early Jurassic. Redfieldiiforms were fairly typical Triassic fish in overall anatomy. They had a fusiform (streamlined, tuna-like) body shape with thick, ganoine-covered scales.
Acregoliath is an extinct genus of ray-finned fish that existed during the middle of Miocene epoch, about 13.76 to 13.34 million years ago. [1] It is known from very fragmentary remains which consist of several scales that were found in Brazil.
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.
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.
The first spinous ray of the dorsal fin is the strongest and most sharp-pointed. The spikedace has seven dorsal fin-rays and typically 9 anal fin-rays. The spikedace skin is olive-gray to light brown above, with a brilliant silver side, often with blue reflections, and with black specks and blotches on the back and upper side.