Osteichthyes
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Osteichthyes, also known as osteichthyans or commonly referred to as the bony fish, is a diverse clade of vertebrate animals that have endoskeletons primarily composed of bone tissue, encompassing bot
Osteichthyes
Guiyu oneiros, one of the earliest known bony fish, lived during the Late Silurian, 425 million years ago.
The giant sunfish is the heaviest bony fish in the world.
Carassius carassius
Actinopterygii
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Actinopterygii, members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that constitutes nearly 99% of the over 30,000 living species of fish. The vast majority of e
Osteichthyes
…an extremely diverse and abundant group consisting of 45 orders, over 435 families and 28,000 species. The group is divided 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 gave rise to all land vertebrates…
Actinopterygii
Anatomy of a typical ray-finned fish (cichlid) A: dorsal fin, B: fin rays, C: lateral line, D: kidney, E: swim bladder, F: Weberian apparatus, G: inner ear, H: brain, I: nostrils, L: eye, M: gills, N: heart, O: stomach, P: gall bladder, Q: spleen, R: internal sex organs (ovaries or testes), S: pelvic fins, T: spine, U: anal fin, V: tail (caudal fin). Possible other parts not shown: barbels, adipose fin, external genitalia (gonopodium)
Tuna are streamlined for straight line speed with a deeply forked tail
Cod have three dorsal and two anal fins, which give them great maneuverability