Natural selection plays an important role in the evolution of organisms.

This document contains environment-dependent characters.

The United Nations Environment Programme is providing solutions to global environmental problems.

The small fish are swimming in the river.

The small fish are swimming in the river.

There is a rumor that a fish with a human-like face lives in that pond.

You can find a 'tatsu no otoshigo' in this sea.

This fossil is believed to be that of an ichthyosaur.

He took a photo using a fisheye lens.

He caught a big fish.