Brinicles begin forming in cold ocean areas, especially in polar regions like Antarctica โ๏ธ. When salty water freezes, it releases extra salt, creating supercooled water that can be around -1.9 degrees Celsius (28.58 degrees Fahrenheit). This water is denser than the warmer liquid around it, allowing it to sink! As it sinks, it freezes the surrounding water and forms the long, ice structures known as brinicles. These icy fingers can reach several meters long, stretching from the surface to the seafloor! ๐