In its hygiene function, how does the hagfish utilize the knot against the substrate?
Answer
By rubbing the knotted section against the seafloor or surrounding objects
The hagfish employs the knot as a physical tool to scrape or rub against the environment, using that friction to dislodge parasites or accumulated debris adhering to its skin.

Related Questions
What is the primary classification of the hagfish's knotting behavior?What type of forces are generated along the body when a hagfish ties itself into a knot?How does knotting primarily aid the hagfish when it is seized by a predator like a shark?What essential function, besides defense, is served by the hagfish's knotting ability?When forming a knot, the hagfish's tail is often looped around its body passing between which specific structures?What critical aspect of the slime defense is managed through knotting if the defense is only partially successful?What is the energetic implication of knotting for defense versus maintenance?According to the analysis of tractive forces, which species of hagfish was studied?How quickly can a hagfish release itself from the mechanical anchor created by a knot?In its hygiene function, how does the hagfish utilize the knot against the substrate?What is the relationship between stress, slime, and knotting during an attack?