Clouds like drift ice

What the photo above looks like? I thoght it was like a sea covered with drift ice.

Actually, they are the clouds floating in the sky. We have various names of clouds depending on their shape, but what should I call this one?

This cloud appeared on last Tuesday when the weather was good. It looks like a huge column standing.
The clouds themselves are just water drops, so after all the shape of the clouds seems to be the shape of the air reflecting the physical condition of the air ... humidity, density, temperature ...
It is fascinating that the air draws various shapes like this. And I am not tired of seeing clouds in the sky, like the flame of bonfires.
T.S