Invertebrates are a type of creature without a skeleton.

Coelenterates are said to be the first animals with a true body cavity.

He is deeply involved in the animal liberation movement.

We went to the petting zoo on the weekend.

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

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.

I am very interested in natural science.

He has three swords.