Killer whales were sighted during a whale watching tour between the Hokkaido and Kunashir Islands

In Japan, two wonderful and rare killer whales were suddenly noticed.

According to an employee of the travel company, a few years ago, one of the killers was spotted off the coast of Japan, and now a young one has joined him.

In the case of mutation, animals have a partial loss of pigmentation.

Leucism is sometimes confused with albinism, but unlike albinism, leucism lacks pigment cells altogether.

While albinism only affects melanin, leucism results in a decrease in all types of pigments.

Zoologists said that there are five white killer whales in the world.

Scientists speculate it could be due to declining numbers, a sign that the species is in trouble.

This results in rare genetic disorders that prevent animals from surviving in the wild.

The leucism may interfere with their hunting abilities.