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The tiny Osedax worms live inside the carcasses of dead whales, but biologists were puzzled as to how they could break down bones - the worms have no mouths. University of San Diego scientists found that the worms had an enzyme that secretes a bone-melting acid - which is concentrated on the part that digs into their 'food'.
Siboglinidae or 'beard worms' are among the few known animals that, as adults, completely lack a mouth, gut and anus, and rely entirely on esymbiotic bacteria for their nutrition.
Only the females are equipped with this terrifying 'bio weapon' - the males are tiny, and each female is surrounded by a 'harem' of them inside a gelatinous tube.