D. ROBERTS / SCIENCE PHOTO LIBRARY D. ROBERTS / SCIENCE PHOTO LIBRARY
Starfish and abalone. Coloured X-ray of a starfish (class Asteroidea) and an abalone (Haliotis sp.). A starfish typically has 5 arms radiating outward from a central disc. Tube feet (not seen) located on the undersides of the arms are used for movement. A starfish does not have a brain. Instead, coordination is controlled by one or more rings of centrally-located nerves. An abalone is a mollusc, related to limpets and snails. Its flat shell contains a row of holes, through which inhaled sea water is expelled after respiration is complete. Several species of abalone are edible and are an important food source.
Model release not required. Property release not required.