Add in the octopus’s small size (generally around eight inches), relatively short arms, bell-shaped body, pale coloring, and tendency to hover over the seafloor, and you’ve got a cephalopod ...

However, fossilised evidence of ammonite arms is yet to be found. Until now, a lot of what we know about ammonites has been inferred based on what we see in living cephalopods. The subclass Ammonoidea ...

Today there are more than 750 known living species of cephalopods. Besides around 300 species of octopus, these include an array of squid and cuttlefish (both of which have 10 limbs) and a few ...

How can the soft bodies of coleoid cephalopods so aptly hide in their environment? Why must they? What cells and specialized organs make such crypsis possible for one of the older evolutionary ...

Octopuses are cephalopods that live in oceans around the world. They are also some of the most intelligent creatures on Earth ...

The vampire squid (Vampyroteuthis infernalis) isn't actually a squid. And though its scientific name means "vampire squid from hell," it isn't actually a vampire either. Although, in the deep ...

Drawing on over 300 scientific studies, we have evaluated the evidence of sentience in two groups of invertebrate animals: the cephalopod molluscs or, for short, cephalopods (including octopods, squid ...