The animal with the biggest eyes: the king squid has the largest eyes in the world, with a diameter of 38 cm. The blue whale's eyes are only 12 cm, and the average recorded diameter is 30.5 cm.

King squid is a giant squid and the largest invertebrate in the animal kingdom. It is said that the longest king squid may be about 30 meters. These animals live in the deep sea below 3 kilometers and are extremely difficult to see. They are sperm whales' favorite food, but sometimes they can kill sperm whales because they often block their nostrils with tentacles and suffocate them.