This striped sun star (Solaster stimpsoni) close-up shows the sieve plate (madreporite) in the upper right of the photo. The sieve plate has grooves and small pores where ocean water circulates through the sea star to provide nutrients and assist with movement.
The striped sun star can have 9 to 11 rays. This sea star can grow to 22.8 inches (58 cm) in diameter, and has a diet that consists mostly of sea cucumbers. The striped sun star has a range that includes Japan, as well as northern Alaska to central California.