Three divers looking at a Giant Pacific Octopus (Enteroctopus dofleini) in the Sea of Japan. Octopuses are iconic for their eight arms. But how many hearts does an octopus have? It turns out that an ...

The octopus is one of the world’s most amazing creatures, and nothing puts that into perspective more than the physiological differences between these fantastic sea-dwelling mollusks and the creatures ...

Research‍‌‍‍‌‍‌‍‍‌ biologically the octopuses are fascinating because in a way they are the most alien creatures among marine animals. Their physiology is something of a paradox, as they can be very ...

Octopuses are odd: They have more than one heart and copper-rich blue blood. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. It turns out that an ...