Nettastomatidae
Nettastomatidae, from Ancient Greek νῆττα, meaning "duck", and στόμα, meaning "mouth", are a family of eels known as the duckbill eels or witch eels.
Duckbill eels are found along the continental slopes of tropical and temperate oceans worldwide. They are bottom-dwelling fish, feeding on invertebrates and smaller fish. They are slender eels, up to in length, with narrow heads and large, toothy, mouths. Most species lack pectoral fins.