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KING RAGWORM Alitta virens ©Alexander Semenov. Sandworms eat seaweed and microorganisms. They have distinctive traits, including: often reaching great length, sometimes exceeding four feet numerous, highly vascularized parapodia* along both sides of their bodies, and blue heads with two large pincer teeth. *The parapodia function both as external gills (the animal’s primary respiratory surfaces), and as means of locomotion (appearing much like short legs).
A sunflower sea star is draped moplike over a seafloor rock off the British Columbia coast. Though commonly called starfish, sea stars are not fish but echinoderms, more closely related to sea urchins and sand dollars. Only the five-armed species really resemble stars—others may boast as many as 40 appendages. It is the largest sea star in the world. Sunflower sea stars can grow to have an arm span of 1 metre (3 ft 3 in) in diameter.