On one occasion, it was recorded that a king squid wrapped its thick tentacles and suckers around a sperm whale, which in turn bit the tail of the king squid with all its might. The two giants of the sea tumbled violently, churning up turbulent waves, and then both sank to their deaths.

The king squid's main weapon is its ten "arms," which are filled with circular suction cups with a ring of small serrated teeth around the edges, which can suck the flesh out of the sperm whale, leaving many circular scars on the whale (the long stripes of scratches are left by the giant sourpuss squid).

The giant king squid is one of the largest known invertebrates in the world, and the second largest squid in the world, the first being the giant king sourpuss squid, which is generally 2-3 meters larger than the giant king squid, and as many as 4-5 meters. The giant squid has almost no natural predators and is only of value to humans for research, not for consumption. The natural predators of the giant squid as a tiny juvenile are deep-sea fish such as anglerfish, which feed on small organisms.

The only natural predator of immature juvenile and adult squid is the sperm whale. Giant gun squid are the creatures with the largest eyes in the animal kingdom. Their large eyes are mainly used against their only natural enemy, the sperm whale.

Their eyes are equipped with luminescent organs that produce their own light and can also detect the shimmering light emitted by other creatures. In the pitch-black depths, they determine the location of the sperm whales by discerning the flow of glowing microorganisms around them.

Even though the giant squid's tentacles can grab the sperm whale's head and resist, the sperm whale ultimately wins. However, there have been cases where the squid has wrapped itself around a sperm whale's breathing holes and suffocated the whale. The giant squid, also known as the king squid, is the world's largest squid and the world's largest invertebrate. Not only is it long, but its eyes are also large, making it the creature with the largest eyes in the animal kingdom, and it also glows, mainly to deal with its natural enemy, the sperm whale.