the paleozoic period is known as the age of the fishes.
the paleozoic period is known as the age of the fishes.
which period is known as the age of the fishes?
paleozoic
section::::jawed fish.:bony fishes.:ray-finned fishes.









































ray-finned fishes, class actinopterygii, differ from lobe-finned fishes in that their fins consist of webs of skin supported by spines ("rays") made of bone or horn. there are other differences in respiratory and circulatory structures. ray-finned fishes normally have skeletons made from true bone, though this is not true of sturgeons and paddlefishes.









































ray-finned fishes are the dominant vertebrate group, containing half of all known vertebrate species. they inhabit abyssal depths in the sea, coastal inlets and freshwater rivers and lakes, and are a major source of food for humans.









































section::::timeline.









































section::::timeline.:devonian: age of fishes.
evolution of fish
bullet::::- "ellopostoma mystax"









































section::::ray-finned fishes.:cypriniformes.:psilorhynchids.









































bullet::::- "psilorhynchus microphthalmus"









































section::::ray-finned fishes.:osmeriformes.









































species









































subspecies









































bullet::::- "plecoglossus altivelis ryukyuensis"









































section::::ray-finned fishes.:perciformes.









































there are 133 species and one subpopulation in the order perciformes assessed as endangered.









































section::::ray-finned fishes.:perciformes.:other perciformes.









































species









































subpopulations









































bullet::::- swordfish "(xiphias gladius)" (1 subpopulation)









































section::::ray-finned fishes.:other ray-finned fishes.









































species









































subpopulations









































bullet::::- white sturgeon "(acipenser transmontanus)" (1 subpopulation)









































section::::hagfishes.









































bullet::::- "myxine paucidens"









































bullet::::- "paramyxine taiwanae"









































section::::see also.









































bullet::::- lists of iucn red list endangered species









































bullet::::- list of least concern fishes









































bullet::::- list of near threatened fishes









































bullet::::- list of vulnerable fishes









































bullet::::- list of critically endangered fishes









































bullet::::- list of recently extinct fishes
list of endangered fishes