Tube feet of the Sunflower Sea Star.

''Pycnopodia helianthoides'', commonly known as the sunflower seastar, is a large sea star found in the northeast Pacific. It is among the largest sea stars in the world, with a maximum armspan of 1 m. Sunflower seastars usually have 16 to 24 limbs; their color can vary widely. They are predatory, feeding mostly on sea urchins, clams, snails, and other small invertebrates.