Grey mullet is a species of mullet, which is widely distributed in temperate and tropical coastal areas such as the Pacific Ocean, Indian Ocean, Atlantic Ocean, Mediterranean Sea, and Black Sea.

Grey mullet has a long body, nearly cylindrical in the front and flattened in the rear, and the body length is 4.1 to 4.8 times the body height and 3.8 to 4.1 times the head length. The head is medium in size, slightly raised on both sides, broad and flat dorsally, and the snout is short and wide. The eyes are large, round and located on the front half of the head. The front and rear fat eyelids are well developed, reaching the pupil. Nostrils have 2 on each side, located above the front of the eye, sharp in front, with a protrusion in the center. Both jaws have villiform teeth, arranged in a single row. Tongue large, round, located in the back of the mouth, not free. The gill openings are wide, the gill rakers are slender, the opercular membrane is not connected to the isthmus, and the front opercle and the margin of the opercle have no spines. Grey mullet Grey mullet has developed false gills. The scales are large, the body scales are ctenoid scales, the head is round scales, except the first dorsal fin, all fins have small round scales, each with a length on both sides of the base of the first dorsal fin, the axilla of the pectoral fin, the upper part of the base of the pelvic fin and the middle of the two pelvic fins Triangular axillary scales. The lateral line is not obvious, and there is a small tube without opening in the center of the lateral scale. The two dorsal fins are short and far apart. The first dorsal fin has 4 spines; the second dorsal fin is larger, similar to the anal fin, with 1 to 2 spines; the ventral fin has 1 spine and 5 rays. The caudal fin is forked, the upper lobe is slightly longer than the lower lobe. The body cavity is large and the peritoneum is black. The stomach is tubular, with a specialized spherical gizzard in the pylorus. The intestine is slender and curved, about 7 times its body length. The pyloric cecum is large, 2. The swim bladder is large and the wall is thin. Grey mullet has a bluish-grey body with a lighter abdomen and several dark longitudinal bands on the upper half of the body. The fin rays are light gray, with a black patch at the base of the pelvic fin.
Because of its slender body, Grey mullet is rod-shaped, and the coastal masses also call it "mullet".