An octopus, cuttlefish or squid is essentially a snail that swapped its shell for smarts. “They have the biggest brain of any invertebrate by far,” said Joshua Rosenthal, a neurobiologist at ...

Correcting the octopus’ image; Biology: Yes, they’re slimy. But they also are as smart as a laboratory rat, have a playful side and literally die for their brood, a researcher says.

An important characteristic that has been investigated has to do with the end of an octopus' life. Octopuses are semelparous animals, meaning that they reproduce once and then die. This death is ...

“Octopus seem to have highly evolved nervous systems, although I’m not sure we’d call the dense concentration of neurons that connect their eight limbs and huge eyes a brain, [it’s] more a ...