The anglerfish is a rare fish that lives in the deep sea.

I have a sterlet in my aquarium.

He is an expert in tidology, conducting research on ocean tides.

He is majoring in tidal science.

His personal strength is that he is very sincere.

Her family adopts a matriarchy.

The tundra swan lives in cold regions.

I saw a whooper swan in the park.

The mountain avens is one of the beautiful flowers in the mountains.

He is the editor in chief of this magazine.