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

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

This flower is very rare.

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.

I buy fresh fish at the fish market every week.

Grilled eel is a traditional Japanese dish.

I love eel.

This old document details the method of catching eels.