The noble pen shell, Pinna nobilis, largest bivalve of the Mediterranean. They are highly endangered due to overexploitation and destruction of their native seagrass environment. They can grow up to a millimeter each day, making them some of the fastest growing bivalves in the world.
A fan mussel among the seagrass it calls home (Arnaud Abadie on Flickr)
The fan mussels (Pinna nobilis) are a species of enormous mussel which live in seagrass beds of the Mediterranean Sea. They can grow to nearly 4 feet long (though most are 1-2 feet in size at maturity), and live with most of their bodies protruding straight up out of the sediment, anchored down into the sand with long…
