![]() These trails were observed to run in all directions, including uphill. “We conclude from this that the sponges might actively move across the sea floor and leave these traces as a result of their movement,” reports Dr Teresa Morganti, sponge expert from the Max Planck Institute for Marine Microbiology in Bremen. The surprise was great when researchers looked at high-resolution images of the sea floor of the Arctic deep sea in detail: path-like tracks across the sediments ended where sponges were located. They are now publishing these unique findings in the journal Current Biology. ![]() They conclude that the animals might move actively – even if only a few centimetres per year. Antje Boetius has now discovered that sponges leave trails on the sea floor in the Arctic deep sea. ![]() ![]() Sponges are considered to be one of the most primitive forms of animal life, because they have neither locomotion organs nor a nervous system. ![]()
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