vampire squid noun2 •Any of the order Vampyromorphida of cephalopods with eight arms which are united by a web of skin. •A small cephalopod (Vampyroteuthis infernalis), found throughout temperate and tropical oceans in extreme deep sea conditions.The Vampire squid – which is actually an octopodiform and not a squid, and looks like an apparition from an impossibly ancient dream – is harmless to humans. — 2012 formsvampire squids