What is a cartilaginous fish definition?

What is 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.

What are 2 examples of cartilaginous fish?

Cartilaginous fish include sharks, rays, skates and chimaeras. There are approximately 600 different species of rays and skates and about 500 shark species. Rays and skates live in oceans throughout the world. Most rays and skates live on the bottom of the ocean while some live in open water.

What are three examples of cartilaginous fish?

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

Is Shark a cartilaginous fish?

Sharks, rays, skates, and chimaeras (also know as rat fishes) all have cartilaginous skeletons.

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).

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Which is not cartilaginous fish?

Dog fish is the only animal which belongs to superclass Pisces. Dog fish is a cartilaginous fish. Elasmobranchii (dog fish) is an alternative name for cartilaginous fish or Chondrichthyes. The name refers to the fact that the gill-slits are exposed and not covered by an operculum.

How long do cartilaginous fish live?

How Long Do Cartilaginous Fish Live? Some cartilaginous fish may live for up to 50-100 years.

What is the difference between a bony fish and cartilaginous fish?

They are marine. Endoskeleton is made up of bone. Endoskeleton is made up of cartilage. They have 4 pairs of gills.

Bony fish Cartilaginous fish
Exoskeleton is made up of cycloid scales. Exoskeleton is made up of Placoid scale.

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.

How many cartilaginous fish are there?

There are an estimated 934 species of cartilaginous fishes compared to about 22,000 species of ray-finned fishes.

What type of scales do cartilaginous fish have?

Cartilaginous fishes (sharks and rays) are covered with placoid scales. Some species are covered instead by scutes, and others have no outer covering on part or all of the skin.

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.

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What makes a shark different from a fish?

Sharks are fish. They live in water, and use their gills to filter oxygen from the water. Sharks are a special type of fish known because their body is made out of cartilage instead of bones like other fish.

What was the first cartilaginous fish?

The first Cartilaginous fishes evolved from Doliodus-like spiny shark ancestors. A Bayesian analysis of molecular data suggests that the Holocephali and Elasmoblanchii diverged in the Silurian (421 million years ago) and that the sharks and rays/skates split in the Carboniferous (306 million years ago).

Where would you find a cartilaginous fish in the food chain?

Most cartilaginous fish are considered apex predators, organisms at the top of food chains. As apex predators, these organisms play a crucial role in sustaining the health of the marine ecosystem, maintaining stability by keeping the prey species’ populations balanced.

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