Long, slender eel-like fishes with two dorsal fins near the tail, 7 pairs of pore-like gill openings, a single median nostril and an oral disc fringed with skin flaps and armed with many small, horny teeth. Adults dark brown to grey; young adults at sea are silver or silvery cobalt blue, with two greenish or blue-green dorsal stripes. To 60 cm.
These are primitive, migratory jawless fishes spawn eggs in the headwaters of freshwater rivers and streams. After metamorphosis, young adults migrate downstream to estuaries and coastal waters, where they feed parasitically by rasping flesh from other fishes with their toothy tongues. They eventually cease feeding and migrate back to freshwaters to breed.
Native to Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed