Question

Write 10 characteristics of pisces

Answer 1

• They are found in fresh, marine, and brackish water.
• The body is usually streamlined. Some have a spindle-shaped or elongated body as well.
• Their body is distributed into a head, trunk and tail.
• They swim with the help of their tail.
• Paired and unpaired fins represent the appendages. These help the fish to balance while swimming.
• The lateral line system functions as a sensory organ to sense the disturbances in the nearby environment.
• The body is covered with thick-seated scales, which helps by providing protection to the internal organelles.
• The gills help in respiration.
• Closed type blood circulation is observed.
• The internal skeleton is bony or cartilaginous.
• These are cold-blooded organisms.
• They may be herbivores or carnivores, oviparous or ovoviviparous.
• The sexes are separate.
• Fertilization may be external or internal.
• They lack extra-embryonic membranes.
• The digestive system is well-developed.
• The nervous system comprises of the brain and ten pairs of the cranial nerves.

Answer 2

Explanation:

1. They are found in fresh, marine, and brackish water.

2. The body is usually streamlined. Some have a spindle- shaped or elongated body as well.

3. These are cold blooded organisms.

4. The gills help in respiration.

5. They swim with the help of their tail.

6. The sexes are separate.

7. Fertilization may be external or internal.

8. They lack extra - embryonic membrane.

9. The digestive system is well developed.

10. Their body us distributed in the head, trunk and tail.