Ghost whale
The ghost whale is the only whale belonging to the rat's head in the neck of a whale. It is also called gray whale or gray whale. The whale grows up to 15 meters in length and weighs 36 tons, with an average life expectancy of 50 to 60 years. Currently distributed only in the North Pacific Ocean, there are a group that moves along the North Pacific coast of the Pacific Ocean and a group that travels along the Northeast Asian coast, but these two populations are not classified as subspecies. In other words, these two populations are classified as one single species. The distance traveled is very long in the whales with black whales. At one time, the number of individuals in both groups increased, but overfishing started in the 19th century and the number of them decreased. The Northeast Pacific migrating along the North American coast has been protected since the beginning of the 20th century and now has grown to more than 20,000. However, the Northwest Pacific migrating to the Northeast Asian coast is much smaller due to overfishing in the past and Japan, It is also dangerous. There was also a group of ghost whales in the Atlantic, but it was extinct in the 17th century.