What is the difference between bony fish and sharks?
While bony fishes have one gill opening on each side of its body, sharks have five to seven. The gills of bony fishes are also hidden behind flaps that open and close, whereas sharks have exposed gill slits.
What are the differences between bone and cartilage?
Difference between Bone And Cartilage
| Basis of Comparison | Bone | Cartilage |
|---|---|---|
| Cell Name | Bone cells are called osteocytes | Cartilage cells are called chondrocytes |
| Growth | Bidirectional. They grow in both directions. | Unidirectional. It grows in a single direction |
| Bone Marrow | It is present | It is absent |
| Blood Vessels | Present | Absent |
What kind of fish is a cartilaginous fish?
Bony fish and cartilaginous fish are two groups of fish that represent two classes of aquatic chordates. Bony fish belongs to the class Osteichthyes while cartilaginous fish belongs to the class Chondrichthyes.
How are bone fish different from bony fish?
It is worth noting that we can find some representatives that do not follow the rules below. First we can differentiate the two groups by the skeleton. Cartilaginous fish have a skeleton made up entirely of cartilage, while bone fish have a skeleton made up of bones. Another striking difference is the gills.
When did bony fish and cartilaginous fish diverge?
Bony fish refers to a large class of fish distinguished by a skeleton of bone. The divergence of bony fish and cartilaginous fish occurred about 420 million years ago. Around 27,000 species of bony fish have been identified worldwide. Bony fish belong to the class Osteichthyes. They are also known as teleostomi.
How does reproduction take place in a cartilaginous fish?
In cartilaginous fish, reproduction occurs internally. The sperm is deposited inside of the female in order to fertilize a small number of large sized eggs with a significant amount of yolk. Cartilaginous fish embryo may develop in one of two manners.
What kind of fish are bony and cartilaginous?
Bony fish and cartilaginous fish are two groups of fish that represent two classes of aquatic chordates. Bony fish belongs to the class Osteichthyes while cartilaginous fish belongs to the class Chondrichthyes. Bony fish can be found in both marine and fresh water.
It is worth noting that we can find some representatives that do not follow the rules below. First we can differentiate the two groups by the skeleton. Cartilaginous fish have a skeleton made up entirely of cartilage, while bone fish have a skeleton made up of bones. Another striking difference is the gills.
Bony fish refers to a large class of fish distinguished by a skeleton of bone. The divergence of bony fish and cartilaginous fish occurred about 420 million years ago. Around 27,000 species of bony fish have been identified worldwide. Bony fish belong to the class Osteichthyes. They are also known as teleostomi.
How are the gills of a cartilaginous fish protected?
In cartilaginous fish, the gills are exposed and not protected by any external skin. Cartilaginous fish lack bone marrow for hemopoiesis; instead they produce red blood cells in the spleen and thymus organ.
What are the differences between 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.
