D. ROBERTS / SCIENCE PHOTO LIBRARY D. ROBERTS / SCIENCE PHOTO LIBRARY
Guitarfish. Coloured X-ray of an Atlantic guitarfish (Rhinobatos lentiginosus). Its head is at upper right. This is a relative of the rays, and as such has no true bony skeleton, instead having rods of cartilage. The guitarfish is a bottom-dwelling fish that inhabits the western Atlantic Ocean. It feeds on molluscs and crustaceans, and can reach a length of up to 75 centimetres.
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