Squids do not have lungs. Lungs do not really work under water. They have gills.

Squid bodies are covered with a mantle, which is sort of like a tube sock. The gills are hidden inside the mantle. If you look at a picture of a squid, you can see that the mantle starts right behind the eye. That would be the open end of the mantle. They can open it up to let water go in.

All squids, giant ones and small ones, have bodies that are like this.

If you are interested in animals that live in the sea, you may want to be a marine biologist some day.

Giant squids have lungs, but not the way you and I have lungs. The squids live in the ocean, and do not come to the surface for air, so they must get the oxygen they need from another way. Fishes, octopi, squids, use gills.

The gills are similar to our lungs in the idea that they take oxygen from what is brought to it. So in our lungs, we breathe in air, and in this air, we have some oxygen. When these oxygen molecules come into contact with our lung surface, they are transported into our cardiovascular system (heart, arteries, and veins) so that all of our organs can get oxygen, and stay alive. Gills use the ocean water.

The animal (like a squid) pumps (or breathes) water to the gills, and when oxygen in the water touches the gills, it is transported into their cardiovascular system (heart, arteries, and veins). Their heart system then pumps the blood through their body, and keeps the squid alive. You can see their outlet (siphon) above their eyes on the posterior side of the mantle (opposite the pointy side).