NATURAL HISTORY MUSEUM, LONDON / SCIENCE PHOTO LIBRARY NATURAL HISTORY MUSEUM, LONDON / SCIENCE PHOTO LIBRARY
Shell of the world's largest extant snail species, growing up to 91 centimetres. It also feeds on the world's longest worms, pulling them from sediment with its 25-centimetre tubular mouth. It is hunted in turn by humans, for its meat and its highly collectable shell.
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