This image has been around the internet with a claim that it’s a frozen wave. Cute but nonsense:
there are no temperatures on earth low enough to flash freeze a wave of liquid ocean water.

This is actually blue ice, formed at the bottom of glaciers where the pressure is great enough to squeeze the air bubbles out of packed
snow, leaving almost pure ice. There are fields of this stuff in Antarctica; it also occurs in Iceland, New Zealand and other places.