Difference Between Chondrichthyes and Osteichthyes

Chondrichthyes are cartilaginous fish whose endoskeleton is made up of cartilages while endoskeleton of Osteichthyes is made up of bones. ... The main difference between Chondrichthyes and Osteichthyes is the composition of their endoskeleton and habitat.

What is the major difference between cartilaginous and bony fishes?

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.

What are 2 similarities and 2 differences between cartilaginous and bony fish?

However, the most obvious disparity between the two types of fish is the composition of their skeleton.
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What are three characteristics of chondrichthyes?

Key Features of Chondrichthyes

• Resemble bony fish and terrestrial vertebrates in having jaws and paired appendages.
• An electroreceptive system is well developed.
• Endoskeleton entirely cartilaginous.
• No swim bladder or lung.

How many common characteristics found in chondrichthyes and osteichthyes?

(i) Body is streamlined and mouth is terminal. (ii) Gills are convered by operculum. (iii) Skin convered with cycloid and placoid scales. (iv) Many of them are viviparous.

What separates sharks from other fish?

Most other fish have skeletons made of bone. A shark's skeleton is made of cartilage, a type of strong but flexible tissue. Most other fish are covered in smooth, flat scales. A shark is covered in sharp, toothlike scales called denticles.

What is the biggest difference between Class chondrichthyes and osteichthyes?

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.

Are sharks cartilaginous fish?

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.

What are fishes similarities and differences?

All fish share two traits: they live in water and they have a backbone—they are vertebrates. Apart from these similarities, however, many of the species in this group differ markedly from one another. Fin fish like salmon have gills, are covered in scales, and reproduce by laying eggs.

What is the classification of a fish?

Fishes are typically divided into three groups: superclass Agnatha (jawless fishes), class Chondrichthyes (cartilaginous fishes), and superclass Osteichthyes (bony fishes). The latter two groups are included within the infraphylum Gnathostomata, a category containing all jawed vertebrates.

Are chondrichthyes Amniotes?

Includes Myxini, Cephalaspidomorpha, Chondrichthyes, Osteichthyes, Amphibia. Amniotes - vertebrates that possess an amnion. Includes Reptilia, Aves, Mammalia.

Do chondrichthyes have bones?

Members of the Chondrichthyes all lack true bone and have a skeleton made of cartilage (the flexible material you can feel in your nose and ears). Only their teeth, and sometimes their vertebrae, are calcified; this calcified cartilage has a different structure from that of true bone.

Where are chondrichthyes found?

Members of the Chondrichthyes can be found in nearly all aquatic ecosystems and depths, except the most extreme conditions. But most species are restricted to and specialised for a particular oceanic zone. For example, the skates (members of Rajidae) and angel sharks (Squatinidae) are benthic species.

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