Question

Give an example of an animal not belonging to the phylum Pisces.

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:
The main distinguishing feature of Pisces :
1. They have a very elongated body that has 6 – 15 pairs of gills slits or the process of respiration.
2. They do not have jaws in their mouth so they have a sucking and circular mouth.
3. Their body is completely covered with 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 is soft in nature.
5. The notochord is present in the whole life span of 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 takes place in the ocean.
8. They are cold-blooded organisms and poikilotherms in nature, they do not have an air bladder in their body so to sink in the water, they have to swim in water continuously.
Mammals and reptiles are examples of animals that do not belong to Pisces. The Whales are mammals with the following characteristics: they breathe air, are warm-blooded, give live birth, suckle their young with milk, and have hair. All are entirely aquatic, with specialized adaptations for living in water such as flippers and tail flukes.

Thus, The Whale is not a member of the Class Pisces.

Note:
Pisces, named after the Latin plural of fish, is the 14th largest constellation in the sky, with an area of 889 square degrees. While it is a large constellation, its stars are faint (none are brighter than fourth magnitude), making it difficult to see with the naked eye in the sky.