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in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish...

(/ˌæktɪnɒptəˈrɪdʒiaɪ/; from actino- 'having rays' and Ancient Greek πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is...

A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals...

appendicular skeleton supporting the fins. The fins are made up of bony fin rays and, except for the caudal fin, have no direct connection with the spine...

divided into the lobe-finned and ray-finned fish. About 96% of all living fish species today are teleosts, a crown group of ray-finned fish that can protrude...

into two main clades, the ray-finned fish (Actinopterygii, which makes up the vast majority of extant fish) and the lobe-finned fish (Sarcopterygii, which...

is its very long dorsal fin consisting of 145 to 250 rays, and running from mid-back to the base of the tail. The caudal fin is a single lobe, though...

two separate groups: the Actinopterygii (or ray-finned fish) and Sarcopterygii (which includes the lobe-finned fish). During the Devonian period a great...

derived from these fins. Sarcopterygians also possess two dorsal fins with separate bases, as opposed to the single dorsal fin in ray-finned fish. The braincase...

four subpopulations of species, and one subpopulations of subspecies of ray-finned fish assessed as critically endangered. Acipenseriformes includes sturgeons...

A barracuda is a large, predatory, ray-finned fish known for its fearsome appearance and ferocious behaviour. The barracuda is a saltwater fish of the...

tetrapods (which includes amphibians, reptiles, birds and mammals) than to ray-finned fish. Well-represented in both freshwater and marine fossils since the...

(/ˈmɑːhiːˈmɑːhiː/) or common dolphinfish (Coryphaena hippurus) is a surface-dwelling ray-finned fish found in off-shore temperate, tropical, and subtropical waters worldwide...

The wolf eel (Anarrhichthys ocellatus) is a species of marine ray-finned fish belonging to the family Anarhichadidae, the wolf fishes. It is found in the...

the reedfish comprise Polypteridae /pɒlɪpˈtɛrɪdiː/, a family of archaic ray-finned fishes and the only family in the order Polypteriformes /pəˈlɪptərɪfɔːrmiːz/...

Araiophos is an oceanic ray-finned fish genus which belongs in the family Sternoptychidae. There are currently two recognized species in this genus: Araiophos...

is, by far, the largest infraclass in the class Actinopterygii, the ray-finned fishes, and contains 96% of all extant species of fish. Teleosts are arranged...

then use a strategy called "tenting". With pectoral fins pressed against the substrate, the ray will raise its head, generating a suction force that...

the sister group of Cladistia (bichirs) in the class Actinopterygii (ray-finned fish). Dating back to the Permian period, the Actinopteri comprise the...

known as the great barracuda, is a species of barracuda: large, predatory ray-finned fish found in subtropical oceans around the world. The great barracuda...