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52.3 MB (1.5 MB compressed)
4680 x 3909 pixels
39.6 x 33.0 cm ⏐ 15.6 x 13.0 in (300dpi)
D. ROBERTS / SCIENCE PHOTO LIBRARY D. ROBERTS / SCIENCE PHOTO LIBRARY
Starfish (family Asteroidea), coloured X-ray. This marine animal is an echinoderm. It has five-fold symmetry with arms radiating outwards from the centre. Its mouth is located on the underside and the anus on top of the central disc. With no front or back it can move over the seabed in any direction, walking on its hundreds of tiny tube feet (not seen). It does not, however, have a brain. Instead, rings of nerves surround the central oesophagus and co-ordinate the movement of the starfish. Starfish can be predators, plant-eaters or scavengers. This starfish is from the coastal waters of Devon, England.
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