The narwhal is an interesting creature in the sea which use to be called the unicorn of the sea. Narwhals live in the polar ocean and are a type of whale which is also a mammal. Their home is the cold sea in the arctic area. They are carnivores and are one type animal that is in the highest position of the food web in the sea. They have a big tusk which can be as long as three meters! They are very good at swimming. In conclusion, narwhals are very interesting animals. They deserve more attention from humans because they are endangered due to  habitat loss caused by human pollution.