Which animal has the longest intestines?

It’s a fairly close contest between the sperm whale and the blue whale. For most whale and dolphin species, the length of their intestines works out as: (body length0.762) x 17.02. That comes to more than 150m of intestine in the case of a large sperm whale and possibly as much as 220m for a blue whale.

Because sperm whales only have teeth on the lower jaw, they cannot chew and may end up eating their prey alive. But every problem has its solution… sperm whales have evolved the longest digestive system in the world: it can reach 300 m long!