The Pteraster moves slowly and steadily. It had a thick, rounded arms making it appear almost cushion-like. Its body is a pale yellow, covered with a delicate pattern of small, raised bumps, and it has a bright orange dot at the center. this is very outstanding against its smooth, textured surface.
The Mottled Star moves slowly and deliberately across the rocky surface. It's arms stretching out methodically as it explores. Its body is striking, with orange color that is beautifully dotted with blue spots, extending from the center of its body all the way down its arms. The star's texture is rough, with a slightly bumpy surface.
I believe this is a pacific purple sea urchin because of the size and the bright purple coloring.