As the name suggests, onychophorans are a unique group of animals that have claws.

He is an expert in paleozoology and has a deep knowledge about the ecology of dinosaurs.

He has a deep interest in paleozoology.

He is as kind as a Buddha.

He is an expert in ethology.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

We went to the zoo with our family on the weekend.

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

Chrysophyta are living in this pond.

Chrysophyta perform photosynthesis underwater, supplying oxygen.