Underwater Brinicles
Brinicles can be found below the surface of sea ice; they are essentially formations that look just like fingers. Although brinicles have been known since the 60s, they have rarely been captured in real-time; the reason for this is because the formations only come to be when specific conditions are created under sea ice.
Brinicles come to be when there are cracks in sea ice and saline water leaks out into surrounding waters. The formations capture numerous creatures like urchins and starfish that call the bottom of the ocean home.