Worms Eat Impenetrable Sea Urchins by Crawling into Their Mouths

Sea urchins living in the Mediterranean have a new enemy: the bearded fireworm. This toothless but determined predator has found a way to devour sea urchins, despite their spines and stony shells. And the worms’ appetite for urchins might remake entire ocean ecosystems.

The bearded fireworm, Hermodice carunculata, grows up to a foot long and is fuzzy, not in the cute way but in the “DO NOT TOUCH” way. The white tufts that run along the worm’s body are clusters of stinging bristles. The sp

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