Sea cucumbers live in the deep sea.

Sea cucumbers live in the deep sea.

In the old days, people used to eat sea cucumbers.

This forest is a habitation for many animals.

Many types of animals inhabit this forest.

Creatures in the deep sea are living, adapted to its harsh environment.

This forest is a habitat for many kinds of animals.

Deep-sea fish have undergone various evolutions due to the harshness of their habitat.