He is using a hand-held net to catch fish in the river.

The government is building a nationwide surveillance network.

We are working on building a new communications network.

He saved money as a safety net before starting his own business.

He likes to take a walk in the park at dusk.

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.