Why water in the arctic that’s below freezing, not frozen?

Question

I was watching a documentary about a team that was planning to go down to the lowest point on the ocean floor somewhere in the arctic.

While the gentleman in the sub was going down, the narrator stated “at this depth, the water outside the submarine is below freezing”.

Soo… why is it not frozen? Does it have to do with the salt content in the water?

ELI5, thanks!

In: Earth Science

Answer 1

It wet. Cold wet is ice only when wet too cold to be hard. No need ice when big water. Little water make small ice because small ice not enough wet for hold water. When big water it not easy make hard. Much big water stays water. Yes.