@sciencefunn: The white thing that shoots out of the worm is its proboscis, the appendage it uses to eat. Seriously, that growing rootlike structure that’s vomited out is designed to drag food inside. Crab, fish, snails, other worms — anything will do (depending on the type and size of the ribbon worm we are talking about). Until the worm needs to eat, the proboscis stays in a sac on top of the worm’s gut. But once the worm senses prey approaching, its muscles contract quickly, forcing fluid into the sheath and the proboscis out into the world through a pore in the worm’s head. The proboscis then grabs what’s for lunch and drags it into the worm’s belly. Checkout @sciencefunn for more science and daily facts. Video credit: unknown (please DM me if you know/are the creator) #Science #biology #nature #wildlife #facts #interesting