He is deeply involved in the animal liberation movement.

Protozoans are single-celled organisms.

As the name suggests, chordates are a group of animals that have a notochord.

That cute little girl is my granddaughter.

As the saying goes, 'spare the rod and spoil the child', if you pamper them, children will not grow.

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.

Invertebrates are a type of creature without a skeleton.

He is an expert in ethology, and his research is highly regarded worldwide.