Nemertea is a phylum of animals also known as ribbon worms or proboscis worms. Most ribbon worms are very slim, usually only a few millimeters wide, although a few have relatively short but wide bodies. Many have patterns of yellow, orange, red and green coloration. Wikipedia
Kingdom: Animalia
Subkingdom: Eumetazoa
Clade: ParaHoxozoa
Clade: Bilateria
Clade: Nephrozoa
(unranked): Protostomia
(unranked): Spiralia
Superphylum: Lophotrochozoa
Phylum: Nemertea

Are ribbon worms harmful to humans: . As a second line of defense, many ribbon worms are poisonous and taste bad. Several species contain tetrodotoxin, the infamous pufferfish venom that can induce paralysis and death by asphyxia.

What does a ribbon worm spit out: The ribbon worm uses its proboscis when hunting, vomiting a feeding tube sheath from above its mouth, which is thick and sticky. It contains mucus that has a neurotoxins that paralyze its prey. The white goo expands, and in the video, you can see the webs branch out on the person's hand.