Ice flowers at sea, red tides, colorful striped ice drifts or ice whirlpools are strange natural phenomena that appear in the oceans.

1. Drift ice has colorful stripes

Depending on the ocean and the area of the iceberg, their temperature and characteristics are often different. This interesting phenomenon appears in cold and frozen waters near Antarctica. Striped icebergs are formed when blue and white icebergs collide, part of the iceberg breaks off and melts together, then freezes again to form icebergs. During the freezing process, impurities and liquid particles mix in, causing the ice blocks to have different colored layers.

2. Whirlpool

Whirlpools are a dangerous phenomenon in the ocean. This is essentially a large destructive whirlpool that quickly sucks up anything that appears in the vicinity. Weather is a factor in determining the force and speed of a whirlpool. There are many legends that vortexes will immediately sink everything to the bottom of the ocean, but scientists refute this assumption.

3. Red tide

Red tide is formed due to the strong growth of toxic algae. Algae will produce toxins and elements that are harmful to marine animals, fish, birds and even humans. One of the best known red tides occurs every summer along the Gulf Coast of Florida, USA.

4. Ice whirlpool

Glacial whirlpools form when salt-rich water is separated from sea ice, then deposited, creating ice with a unique shape. Extremely low temperatures are necessary to create ice whirlpools, so this phenomenon only occurs in icy waters around the North Pole and South Pole. Ice whirlpools are extremely destructive to marine life where they occur. Starfish, fish and even seaweed all die or freeze when exposed to icy whirlpools.

5. Ice flowers

Ice flowers form on young sea ice in cold oceans. Ice flowers only form in cold and windy conditions. The ice clusters are 4 cm in diameter and are often shaped like a flower. Because they are formed from seawater, ice flowers crystallize high levels of salt.

6. The longest wave in the world

The longest wave, also known as Pororoca, appears in the Amazon River in Brazil. This phenomenon only appears once every 2 years, between February and March. The tide passing through the shallow water at the river mouth will create waves up to 6 meters high, lasting up to half an hour before crashing onto the shore and sweeping away everything in its path – from houses, trees to animals.

7. Death wave

Death wave, also known as toxic wave. These waves often appear suddenly without warning. Giant waves that can reach heights of up to 40 m often appear in offshore areas. Death waves are an unpredictable danger for ships and boats traveling at sea.

8. Two-color sea water

When two tidal currents meet at a point in Skagen, Denmark, the sea water will have two different light and dark colors. Because of their different densities and densities, the two tidal currents confront each other, but never merge into one.

9. Bioluminescence

Bioluminescence occurs when light emitted by a living organism combines with oxygen in the air to cause chemical reactions. This phenomenon makes the entire ocean shimmer as if it were lit up.

10. Milky Sea

This phenomenon takes place in the Indian Ocean. Similar to bioluminescence, this is a glowing phenomenon in the ocean but with milky light, creating an image like the Milky Way. The cause of this phenomenon is a type of bacteria that turns sea water blue, but to human eyes, it still has the sparkling color of the “milky way”.

11. Road under the ocean floor

At a depth of 2,000 miles under the sea, explorers discovered rocks lined up in a row that looked like abandoned roads. There have been experts in geology and archeology who have come here to research and they believe that this is not part of the sunken city.

Perhaps this is just natural erosion of limestone, but why it is aligned in a straight line, no one can explain.

12. Strange sounds

In 1999, a 15-second recording of ocean sounds was recorded by scientists. However, no one could explain what that sound was. Many people thought it was the cry of some giant sea monster.

However, NOAA scientists confirmed that it was just the sound of ice breaking. But is this a convincing explanation or is there something more terrifying behind it?