This deep-sea nemertean worm was seen during Dive 09 of the 2021 North Atlantic Stepping Stones expedition. Belonging to the phylum Nemertea, these worms are also known as ribbon worms or proboscis worms. The latter name comes from their impressively long proboscis that they use for hunting. The proboscis is typically inverted into the body — in this video, you can see through the tissue some coils, which is the inverted proboscis. These worms also have the ability to produce a slippery mucus to help them navigate across the seafloor... and also makes them more difficult to catch!