This sea-floor sediment was photographed at 600 metres in a submarine canyon off south-eastern New Zealand. Covering approximately one square metre, it shows signs of animal activity, such as mounds and tracks. Some white, stalked sponges (Stylocordyla borealis) can also be seen. The source of food for life on the sea bed is the sprinkling rain of dead and decaying matter from the upper levels.
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Photograph by Peter Batson
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