Your question: Which characteristic do most cartilaginous fish have?

The distinguishing feature of the cartilaginous fish (class Chondrichthyes) is that their internal skeleton is made entirely of cartilage rather than ossified bone.

What do all cartilaginous fish have in common?

The cartilaginous fish are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage rather than bone.

Which fish is cartilaginous?

Dog fish is a cartilaginous fish. Elasmobranchii (dog fish) is an alternative name for cartilaginous fish or Chondrichthyes.

What is the difference between bony and 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.

Which word best describes cartilaginous fish?

: any of a class (Chondrichthyes) of fishes (such as a shark, ray, or chimaera) having the skeleton wholly or largely composed of cartilage — compare bony fish, jawless fish.

Why are sharks cartilaginous fish?

Cartilaginous skeleton

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Sharks, rays, skates, and chimaeras (also know as rat fishes) all have cartilaginous skeletons. Cartilage is less dense than bone, allowing sharks to move quickly through the water without using too much energy.

How do cartilaginous fish defend themselves?

The mouth, nostrils and gill slits of skates and rays are always found on the underside of the fish, with the eyes and spiracles on the upper side. Many species also have spines and thorns on the upper surface and tail. … Rays defend themselves using the stinging barb on their tail as a weapon against predators.

What is another name for cartilaginous fish?

Cartilaginous fishes (chondrichthyes) represent the oldest surviving jawed vertebrates and, as the name suggests, have a skeleton made out of cartilage. They include sharks, rays, and skates (elasmobranchii) and chimeras (holocephali).

Is a puffer fish a cartilaginous fish?

Bony fish dominate the oceans. They differ from cartilaginous fish because they have bone skeletons and a swim bladder that helps them float.

Are Dolphins cartilaginous fish?

No, dolphins are not cartilaginous fish. This is because, although they are aquatic animals, dolphins are not fish; they are mammals. As mammals, they have body hair and produce milk to feed their young.

Which fish does not have bones?

Sharks don’t have bones.

They are a special type of fish known as “elasmobranch,” which translates into fish made of cartilaginous tissues – the clear gristly stuff that your ears and nose tip are made of. This category also includes rays, sawfish, and skates.

What are the two classes of the bony fish?

There are about 27,000 species of bony fish (Figure below), which are divided into two classes: ray-finned fish and lobe-finned fish.

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What characteristics distinguish bony fish from other fish?

Class Osteichthyes includes all bony fishes. Like all fishes, Osteichthyes are cold-blooded vertebrates that breathe through gills and use fins for swimming. Bony fishes share several distinguishing features: a skeleton of bone, scales, paired fins, one pair of gill openings, jaws, and paired nostrils.

What do you mean by cartilaginous fish?

Cartilaginous fishes (chondrichthyes) represent the oldest surviving jawed vertebrates and, as the name suggests, have a skeleton made out of cartilage. They include sharks, rays, and skates (elasmobranchii) and chimeras (holocephali).

What does cartilaginous mean?

: composed of, relating to, or resembling cartilage The external nose has a cartilaginous framework.

What makes chondrichthyes unique?

Species in this class have paired fins, hard scales, a two-chambered heart, and a pair of nostrils. Most species have 5-7 gill slits on each side of their body. Some species produce egg cases, others give birth to live young.

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