Question: why is myxine called hagfish?
Answer: The species Myxine glutinosa was named for this slime. When captured and held, e.g., by the tail, they secrete the microfibrous mucus, which expands into up to 20 litres (5¼ US gallons) of sticky, gelatinous material when combined with water; one litre of slime has about 40 milligrams of mucus and proteins.