He caught a big fish.

Looking down at the sea, I could see a school of fish swimming.

I ate a dish made from a fish known as 'shusseuo' for the first time.

He threw in a huge amount of money like a boat-swallowing fish to make the project successful.

This restaurant uses substitute fish when expensive types of fish are not available.

This carnivorous fish eats other small fish.

Reeves' shad is a fish commonly seen in rivers in Japan.

A sea otter is a very cute animal that lives in the sea.

In the old days, people were moved by the strength and beauty of the sea lion.

A sea lion is a type of marine animal, and it is very rare.