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What is a Japanese spider crab? They may look like something from a 1950s sci-fi film, but Japanese spider crabs are gentle giants. And giants they are. Of the 60,000 species of crustaceans on ...

Or, catch alive that is. The spider crab is one of those very species, making it seem like the only way to bring these crustaceans back up to land is to viciously crack them up with rocks.

Myself and series researcher, Yoland Bosiger were down on the Mornington Peninsula, south east Australia, to film the annual mass aggregation of spider crabs. These crabs come together to shed ...