‘Penis worms’ were first to invent hermit crab lifestyle, fossils found in China suggest – ABC News

Crabs do it, octopuses too, but now it seems lowly creatures called “penis worms” may have been the first to “hermit” themselves away in shells.
Key points:

• ‘”Penis worms” are animals that live in marine sediments
• But 500-million-year-old fossils from southern…

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