Only two frilled shark were found so far near the coast of Japan in the late 19th century and 2007. This two prehistoric sharks were accidentally caught in fishing nets from the deep sea.
Some animals has been survived on the earth for millions of years, some of them may be horror, or intelligent enough to become a survivor from nature and predators.
Here is the 12 kinds of animals known as living fossils, the frilled shark, golden "Mars" ant and other ancient species animals, some of them remain almost no change over millions of years of evolution.
Perhaps these living fossils might still exist even after human extinction.