Photos from a marine wonderer
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Hyper calcified sponge (Petrobiona massiliana)

petrobiona_massiliana.jpg Anemone shrimp of some kind, poss. <i>Periclimenes brevicarpalis</i>Thumbnails<i>Mycale (carmia) macilenta</i>?

The small white blobs next to the markers are the sponges.
This is a very rare "living fossil". It was first found in dark caves near Marseille and it was determined to be the only living species of a group of sponges previously known only as fossils.
It is now being researched as its skeleton holds a climate record that might be of use in understanding changes in the marine environment and possibly climate change.