Squids- Loligo Duvaucelii
Squids, one of the most complex animals in the Mollusca class, have complex digestive systems. The stomach is found in the middle of the animal. From there, the food moves into the caecum for digestion. The caecum, a long, white organ, is found next to the ovary or testis. In fully grown squids, more priority is given to reproduction so that the stomach and caecum normally shrink during the later life stages. Finally, food goes to the liver (or digestive gland), found at the siphon end, for absorption. Solid waste is passed out of the rectum. Beside the rectum is the ink sac, which allows a squid to rapidly discharge black ink into the mantle cavity.
This is a picture of the vampire squid swimming in the ocean.