Question

What are the characteristic features if the Pisces with a well-labeled diagram of bony fish?

Answer 1

Hint: Pisces belongs to the Chordata phylum of the animal kingdom and the subphylum is Vertebrata, the Vertebrata is further divided into Agnatha and the Gnathostomata, Pisces belong to the Gnathostomata group of the Vertebrata.

Complete answer: 1. The main distinguishing feature of Pisces is that these organisms that they posse fins on their body. They have a very elongated body which has 6 – 15 pairs of the gills slits fir the process of respiration.
2. They do not have jaws in their mouth so they have a sucking and circular mouth.
3. There body is completely covered with the fine scales and very tough in touch as they are aquatic organisms so they also have fins on their body.
4. some Pisces also have a cartilage endoskeleton, the vertebral column is also made up of cartilage and soft in nature.
5. The notochord present in whole life span on their body.
6. The blood circulation system is the closed type and the heart is of two chambers in all the members of this group.
7. They live mostly in the marine habitat but can also migrate to the freshwater bodies to lay their eggs, when eggs come in the larval stage they again join the ocean and their further development took place in the ocean.
8. They are the cold-blooded organisms and poikilothermous in nature, also they don’t have air bladder in their body so to about sinking in the water they have to swim in water continuously.

Note: Petromyzon, hagfish, dogfish are the example of pisces.