Is human digestive system the same with fish?

The answer is: no

Explanation:

The human digestive system and the fish digestive system are different in some important ways. Fish have a shorter digestive tract, and their stomachs are simpler than those of humans. Fish also lack a gallbladder, which stores bile that helps to break down fats. In addition, fish do not have an appendix, which is a small pouch that extends from the large intestine.