Bones or no bones? -- Mollusks on the move -- Sting and shine -- These sponges aren't square -- Bones on the outside -- Wiggly worms -- More boneless bodies.
Summary:
"Who needs bones to swim the seven seas? Not octopuses, clams, crabs, or jellies. Learn more about the lives of these and other ocean animals with no spines. Dive in!"-- Provided by publisher.
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