"Cephalopods are often misunderstood creatures. Three biologists set the record straight."--Science News Largely shell-less relatives of clams and snails, the marine mollusks in the class Cephalopoda--Greek for "head-foot"--are colorful creatures of many-armed dexterity, often inky self-defense, and highly evolved cognition. They are capable of learning, of retaining information--and of rapid decision-making to avoid predators...