The blue whale is the largest mammal in the world.

We have a responsibility to make this world a better place.

He treats us as a big friend.

It takes twenty minutes to get to my house.

There is a test in two days.

The sei whale is one of the particularly large species among marine life.

Omura's whale is a type of whale commonly seen in the seas of Japan.

A Bryde's whale lives in warm sea areas.

The Cuvier's beaked whale is known to inhabit the deep sea.

Humpback whales have particularly beautiful singing voices among marine creatures.