Octopuses have blue blood, three hearts and a doughnut-shaped brain. But these aren’t even the most unusual things about them! Known for their otherworldly look and remarkable intelligence, octopuses ...

But, as that touch information rapidly makes its way through the brain, it is modified by myriad ... tile together to form a ring within the donut-shaped "ellipsoid body" deep in their brains ...

The giant squid’s gullet passes through its doughnut-shaped brain. This means it cannot swallow large pieces of food. Giant squid have a parrot-like beak between their eight arms and two tentacles.