What is this organism?

I am very interested in marine biology.

The plesiosaur is an ancient marine creature, and its appearance greatly differs from current creatures.

Microorganisms are one of the basic forms of life.

Protists are single-celled organisms that live in water.

I love biology.

I am majoring in biology at university.

He is a world-renowned biologist.

Protecting the biosphere is important for the future of the Earth.

In marine biology, plankton is an important part of the marine ecosystem.