The digestive system The digestive system of the cuttlefish is very simple. It begins with the beak, which crushes the food. Particles move down into the mouth and through the esophagus. Food then enters the stomach and eventually passes down in the intestines where it is digested.
The cuttlefish has one of the largest brains for invertebrates. The cuttlefish brain can handle input from a variety of senses, including sight, sound and, even smell