The Washington Post has video of a weird species of crab that always carries around a special species of sea-anemones in it’s claws like *all the time*. And if you take one away, it rips it’s remaining one in half so that it still has two, reproducing those anemones asexually. If you take away both, the crab goes and mugs another crab for one of his.
The anemones don’t appear to exist anywhere except for in these crabs claws any more.
Nature is weird and awesome.