Tube worms produce mucus that glows. MARIELLA GABLER: Snail slime is a natural work of art. DANIEL: These snails produce five types of mucus. First, there's a sticky yet slippery lubricant mucus used for locomotion, which allows a snail to adhere to a surface while gliding along with minimal friction. DANIEL: Now, to study snail slime, you need snails.