Cephalotaxus: A family of Cephalotaxus. The body length is generally less than 300 mm and the maximum is 450 mm, and the body is cylindrical or flat; The maxilla and maxilla are completely healed in a triangle shape; The mandible is usually elongated into a beak; There are generally small fine teeth in the opposite parts of the two jaws, and the teeth often have three tips; There are no teeth on the plough bone, palate bone and tongue; The third piece of upper pharyngeal bone expands into an oval plate, which is densely covered with three-pointed teeth, and the fourth piece of upper pharyngeal bone heals or fuses with it. The hypopharynx is large, triangular and has three-pointed teeth; The gill harrow is developed, and the gill cover is not connected with the gill isthmus; The body is round and scaly; The dorsal fin and the gluteal fin are the same shape, both located at the back of the body, generally opposite, the caudal fin is bifurcated and the pectoral fin strip does not extend.