Question

I want two parts of fish names which fish uses while swimming

Answer 1

Answer:

Fish stretch or expand their muscles on one side of their body, while relaxing the muscles on the other side. This motion moves them forward through the water. Fish use their back fin, called the caudal fin, to help push them through the water. The fish's other fins help it steer

Answer 2

Answer:

1. flexible body
2. fish back and fourth