How do bony fish different from cartilaginous fish?

How do bony fish different from cartilaginous fish?

Technically, the most obvious disparity between bony vs cartilaginous fish comes from the fact that the skeleton of bony fish is made of bones alone, while that of cartilaginous fish is made of cartilage. There are more than 20,000 fish species in the world.

What advantages do cartilaginous fish have over bony fish?

Buoyancy: Cartilage is lightweight and thus much more buoyant than bones. Unlike bony fish, sharks do not need swim bladders to maintain neutral buoyancy. This is because their skeleton is made of cartilage. Since they don’t need to expel extra energy to stay afloat, there is more energy available for propulsion.

What do bony fish have that other fish don t?

They do not have fin spines, but instead support the fin with lepidotrichia (bone fin rays). They also have an operculum, which helps them breathe without having to swim. Bony fish do not produce placoid scales, instead they consist of three types of scales that do not penetrate the epidermis in the process.

What are the key distinguishing features between the bony fish Osteichthyes and the cartilaginous fish chondrichthyes )?

The main difference between Chondrichthyes and Osteichthyes is that the Chondrichthyes is the class of bony fish whose endoskeleton is made up of cartilages whereas Osteichthyes is the class of cartilaginous fish whose endoskeleton is made up of bones.

How do bony fishes and cartilage fishes stay afloat?

Osteichthyes (bony fish) use swim bladders that are filled with oxygen taken in by their gills. The more air in the swim bladder the more buoyant the fish and the less air in the swim bladder the less buoyant the fish. Chondrichthyes (cartilaginous fish) use an oil filled liver to control their buoyancy.

Which characteristics do bony fish have?

Bony fishes share several distinguishing features: a skeleton of bone, scales, paired fins, one pair of gill openings, jaws, and paired nostrils. Osteichthyes includes the largest number of living species of all scientific classes of vertebrates, more than 28,000 species.

How do bony fish and sharks differ?

The key difference between sharks and bony fish is that the shark has an internal skeleton made from cartilages while bony fish has an internal skeleton made from calcified bones. Most of the fish are carnivores or omnivores. Fish may have an internal skeleton made from bones or cartilages.

How do bony fish achieve buoyancy?

Osteichthyes (bony fish) use swim bladders that are filled with oxygen taken in by their gills. The more air in the swim bladder the more buoyant the fish and the less air in the swim bladder the less buoyant the fish. These organs can help them stay neutrally buoyant.