Meaning: Fish move through the ocean using their fins and tails.
Choice of Words: Fish: aquatic animals. Swim: move through water. Ocean: a large body of salt water. Fish move through the large body of salt water.
Alternative Expressions
The fish are swimming in the sea.
Meaning: This sentence also describes how fish move through water, but it uses different words.
Choice of Words: Fish are creatures that live in water. Swimming is an activity that fish do to move through water. The sea is a large body of salt water that is connected to the ocean.
The aquatic creatures propel themselves through the vast expanse of water.
Meaning: This sentence describes how fish move through the ocean using more formal language.
Choice of Words: Aquatic creatures are animals that live in water. Propel means to push or drive something forward. Vast means very large. Expanse means a large area of something. Water is a liquid that covers most of the Earth.