In this class, the mantle is present but the body is more elongated. There is also a distinct head area with wel l developed eyes. The main feeding structure in most cephalopods is a horny beak. They do not always have a radula. If it is present, it acts as a tongue and helps to direct food into the mouth.
Cephalopods have unique abilities which most mollusks lack.
They are able to change the color of their skin so that it blends in with the surroundings. This is called jet propulsion. Cephalopod eyes have received a lot of attention because they are much more developed than other invertebrate eyes. They are more similar to vertebrate eyes because they have a cor nea, lens, and retina. Cephalopods can see images, an ability that is not found in other mollusks or any other invertebrates.