proboscis worm

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soft unsegmented marine worms that have a threadlike proboscis and the ability to stretch and contract

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A proboscis worm, also known as Nemertea, is a phylum of invertebrates consisting of over 1,000 species. These worms are marine, freshwater, or terrestrial organisms that are characterized primarily by their long, slender bodies and a unique feeding mechanism involving a retractable proboscis, or tubular feeding organ, which they use to capture and immobilize their prey. They range in size from only a few millimeters to several meters long in some species.