Hyperotreti - Hagfishes: Taxonomic overview of this group, including characteristics and phylogenetic relationships. The hagfish include four genera: Myxine, Neomyxine, Paramyxine, and Eptatretus.
Introduction to the Myxini: UCMP Berkeley's introduction to the hagfish.
OceanInfo - Hagfish: An illustrated introduction to the Myxini.
Pacific Hagfish: Life history and management of Eptatretus stouti.
The Lowly Hag: Safari Splash offers a defense of the much maligned hagfish, and provides a QuickTime movie of hagfish in action.