starfish

/ˈstɑrˌfɪʃ/
noun
  1. A marine animal with five or more arms arranged around a central disk, also called a sea star.
    • Children love to find starfish in tide pools along the beach.
    • The starfish slowly moved across the ocean floor using its tiny tube feet.
    • While snorkeling, we saw a bright orange starfish clinging to a rock.