WebThe bony fish have a bony skeleton, like the name suggests. Each of the fins on a bony fish have a specific purpose. The caudal (tail) fin [1] helps with steering and controls the speed of forward movement. On a bony fish, the upper and lower lobes of the caudal fin are symmetrical. The anal fin [2] helps the fish with stability, making sure ... Actinopterygii , members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or horny spines (rays), as opposed to the fleshy, lobed fins that characterize the class … See more Ray-finned fishes occur in many variant forms. The main features of typical ray-finned fish are shown in the adjacent diagram. The swim bladder is a more derived structure than the lung. Ray-finned fishes … See more In nearly all ray-finned fish, the sexes are separate, and in most species the females spawn eggs that are fertilized externally, typically with the male inseminating the eggs after they are laid. Development then proceeds with a free-swimming larval stage. However … See more • Media related to Actinopterygii at Wikimedia Commons • Data related to Actinopterygii at Wikispecies See more Actinopterygii is divided into the classes Cladistia and Actinopteri. The latter comprises the subclasses Chondrostei and Neopterygii. … See more
The origin of tetrapods - Understanding Evolution
WebDec 31, 2024 · Fish Fin Rays. Fish fins are made up of a series of bony or soft rays that are supported by a central axis of bones. The rays, which are long and slender, are connected … WebPigmented spot with an indistinct outline or shape. body depth. The greatest straight-line height or depth of the body, from the dorsal to the ventral surface. branched. Split into 2 or more extensions at the tip, as in some fin rays. branchial cavity. The area contains the gills, often also includes the throat. gachette traduction
Spiny and soft-rayed fin domains in acanthomorph fish are ... - PNAS
WebJul 28, 2024 · Ray-finned fish have fins that are supported by thin, bony spines. Examples of ray-finned fish include cod, salmon, tuna, pike, piranha, barracuda, minnow and walleye. Lobe-Finned Fish ... One of the best-known of all fish fins is the dorsal fin of a shark, which is occasionally all that can be seen of the fish as it swims close to ... WebThe most diverse group of fish The ray-finned fishes (actinopterygians) are the largest group of living fishes and compose half of the living vertebrates. There are around 42 orders, 431 families and nearly 24,000 species. Almost all fish that you see belong to this class of fish. The most notable exceptions include lampreys, hagfish, lungfish, and coelocanths. Ray … WebIn Actinopterygians, fins are supported by structures called rays. Some bony fishes have soft, flexible fin rays. Other bony fishes have spiny, rigid fin rays at the leading edges of the dorsal, anal, and pelvic fins. Both soft and spiny fin rays are modified scales. The spiny fin rays of some species are associated with venom glands. black and tan buffalo plaid curtains