Octopus, Squid, and Cuttlefish: A Visual, Scientific Guide to the Oceans' Most Advanced Invertebrates"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 and find prey. They have