He is exactly in the state of 'A frog in a well does not know the vast ocean.'

He was swimming freely as if he was a fish playing in the pot.

He found forensic evidence.

He is a world-renowned ichthyologist.

Looking up at the Big Dipper, I feel at peace.

Life is a series of vicissitudes.

He felt cognitive dissonance between his actions and beliefs.

He arrived in Tokyo yesterday.

Did you hear his voice?

He was begging on the side of the road.