They are a vital part of the marine ecosystem.

Meaning: This sentence describes the fish as an important part of the community of living things in the ocean.

Choice of Words: Vital means essential or very important. Part means a piece or section of something. Ecosystem is a community of living things in a particular environment.

Alternative Expressions

Related Expressions

• Whales are fascinating creatures that play a vital role in the marine ecosystem.
• They are a vital part of our ecosystem.
• Ants are a vital part of our ecosystem.
• Ants played vital role in ecosystem.
• The fish is an important part of the ecosystem.
• Squirrels are important part of forest ecosystem.
• Fish are an important part of the ecosystem.
• Cheetahs are important part of ecosystem.
• Trees are an important part of our ecosystem.
• Horses were a vital part of life.