Gulf Hagfish

The Gulf hagfish (Eptatretus springeri) is a small jawless fish in the family Myxinidae found in deep offshore waters of the Gulf of Mexico, primarily off the coast of Florida. As with other hagfish, it lacks jaws, a bony spine, and paired fins, and is considered part of one of the most ancient surviving vertebrate lineages. The species is comparatively small and less commonly encountered than some other hagfish, and is known mainly from specimens collected in deep trawls and traps. It lives on soft sediment bottoms in cold, dark water on the continental slope, well beyond the reach of sunlight, and like other hagfish is thought to play a scavenging role in deep-sea nutrient cycling.

• Slender, cylindrical, scaleless body, pale pinkish-grey to light tan in color
• No jaws or paired fins; only a low paddle-shaped tail fin
• Slit-like mouth surrounded by short sensory barbels
• Single row of small gill pore openings along each side of the body
• Adult length rarely exceeding about 44 cm, smaller than many related hagfish species

The Gulf hagfish is distinguished from other Gulf of Mexico and Atlantic hagfish mainly by its smaller maximum size, paler coloration, and details of gill pore number, features used by researchers to separate closely related Eptatretus species.

Gulf hagfish live in deep offshore waters of the Gulf of Mexico, primarily documented off the Florida coast, on the continental slope at depths reported from roughly 183 to over 700 meters. They occupy soft muddy or silty sediment in cold, dark water beyond the reach of sunlight, conditions typical of deep continental slope hagfish habitat. Because of the depth and remoteness of their habitat, Gulf hagfish are rarely observed directly and are known mainly from specimens recovered in deep trawls and baited traps used in fishery and biodiversity surveys of the Gulf of Mexico.

Like other hagfish, the Gulf hagfish is believed to be a solitary, deep-water scavenger that feeds on dead or dying fish and invertebrates settling on the seafloor, using a rasping tongue-like structure rather than true jaws. When threatened, it likely releases defensive slime from pores along its body, a trait shared by all hagfish species that helps deter predators by clogging their gills. Much of its specific behavior remains poorly documented due to the depth and remoteness of its habitat, but it is presumed to share the general hagfish pattern of burrowing in soft sediment, feeding opportunistically on carrion, and reproducing as a simultaneous hermaphrodite that lays large yolky eggs on the seafloor.