Firebrick sea star (@ Tobias Bernhard/Corbis)
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- Around 1,600 species of sea stars inhabit the oceans of the world.""Some have as many as 50 arms - five is quite sufficient for these guys
- Starfish, crabs and sponges do live on the seafloor.""But they don\t wear trousers or dance at parties
- Marine biologists are trying to re-brand starfish as ‘sea stars\, because they\re actually not fish.""Surely the same thing should happen to these distant cousins?
- Mammals like us have blood pumping through our vascular system.""What are these guys powered by?
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