He is well versed in mathematics.

He threw the fishing net into the sea.

He works at a large company.

This sea area has been designated as a no-fishing zone.

I love eating fish roe.

The snakehead is a type of freshwater fish, known for its particularly strong vitality.

I went fishing for snakehead.

He hid himself from the enemy using the art of occult hiding.

The emperor in the old days left Kyoto to set out on a journey.

I will go fishing for grouper.