He was fishing outside of the boat.

The police have started searching for the suspicious ship.

We toured the lake by tour boat.

Before starting a new business, he evaluated all the risks as if he were crossing a stone bridge by tapping on it, meaning he was very careful.

The doctor examined my perineum.

They appear to be antagonistic on the surface, but in reality, they are seemingly not part of the same group.

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.

The sea otter is a rare animal, and its ecology is not well known.