Roundworms are an important part of the soil and contribute greatly to the health and fertility of the soil.

He is a world-renowned zoologist.

My pet is a dog.

The government declared a state of emergency to prevent the spread of the new coronavirus.

Cnidarians are a type of marine life, including jellyfish and corals.

We went to the petting zoo on the weekend.

The ecosystem of zoobenthos is an important field of study in marine biology.

Echinoderms are a type of marine life, many of which have star-shaped bodies.

The characteristic of annelids is that their bodies are divided into ring-shaped segments.

A tardigrade can survive in extreme environments.