Question

how is the body of a fish suited to swimming

Answer 1

Fish possess a streamlined body which helps them to swim in water. Fish swim with the help of their fins. Streamlined body helps in orientation of the fish movement  in a particular path.

Answer 2

Fish have a streamlined body and a tail which allows the fish to swim well. Fins are important too since fish are adapted to live in water. Fish have a sense organ called the lateral line which is used to detect movement and vibration in the surrounding water.