Abalone, a marine snail. It is also called ear shell, sea ear, and ormer. Abalones live in warm areas of the Pacific Ocean, in the Indian Ocean, and on Europe's coasts. See more »

Cephalopod, a marine animal. Squids, octopuses, argonauts, nautiluses, and cuttlefish are all cephalopods. See more »

Mollusk, an animal belonging to the phylum Mollusca, a major division of invertebrates (animals without backbones). See more »

Octopus, or Devilfish, an eight-armed marine invertebrate (animal without a backbone). See more »

Oyster, an edible bivalve mollusk (one with a two-pieced shell). The two parts of an oyster shell are unlike in size and shape. See more »

Scallop, an edible mollusk related to the oyster and the clam. There are more than 200 species of scallops. See more »

Squid, a swift marine invertebrate (animal without a backbone). Squid are an important food in Asia and the Mediterranean area. See more »

Octopuses are mysterious sea-creatures that always seem to intrigue young children. Octopuses are smarter and more talented than you may think. They even have a unique defense mechanism to protect them against predators. Take this quiz and learn about the mysteries of the octopus. See more »

Oysters, along with squids and octopuses, are an ancient delicacy. They live short lives along the floor of the ocean throughout the world. Take this quiz and learn more about this interesting sea creature. See more »

Argonaut, or Paper Nautilus, an eight-armed mollusk, closely related to the octopus. See more »