(ANIMAL VIDEO/OCEANS) Commonly referred to as the unicorns of the sea, narwhals are best known for their unicorn-like horns. Scientists have many theories about their tusks’ powers and purpose, but it’s actually a super-sensory tooth that can reach up to 10 feet in length. However, unlike unicorns, narwhals are very real, and unfortunately they face the threat of illegal poachers who have hunted the animal for hundreds of years for their magical tusks. But climate change and pollution are by far the greatest threats to the species, making frigid waters warmer and food more difficult to find. Take a look at the lives of these mysterious creatures in the video above, and click here to see how you can help. — Global Animal