The proboscis worm, a marine animal that belongs to the phylum Nemertea, is also known by several other names. It is often called the ribbon worm or ribbon nemertean due to its long, flat body that resembles a ribbon. Other synonyms for this worm include the Lineus longissimus and the bootlace worm. The latter name comes from the appearance of the proboscis worm, which looks much like a bootlace or string. Some people also refer to it as the sea ribbon or the longworm. Despite its various monikers, the proboscis worm is a fascinating creature that has captured the curiosity of many marine biologists and enthusiasts.