Dai's bleak is also known as green-tipped bleak. The body length is 4.0 to 4.4 times of the body height, 3.5 to 4.3 times of the head length, and 7.0 to 9.0 times of the caudal peduncle length. Head length 3.3 to 4.1 times snout length, 3.8 to 4.6 times eye diameter, 3.2 to 4.0 times eye spacing. Caudal peduncle 1.1 to 1.5 times as long as height of caudal peduncle.

Body very laterally compressed, dorsum behind head obviously elevated, external body shape resembling a humpback, abdomen inward at base of ventral fins, ventral ribs incomplete, from base of ventral fins to anus with ventral ribs. Mouth semi-superior, slit, lower jaw slightly protruding, slightly longer than upper jaw. Body with rounded scales. Lateral line complete, slightly straight. Gill rakers slender. Dorsal fin spines strong and smooth, starting after the beginning of the ventral fin. Pectoral fins larger, pointed at end, slightly exceeding base of ventral fin. Ventral fin ends close to or reaching the anus. Anal fin long, without hard spines. Caudal fin deeply forked, lower lobe slightly longer, swim bladder 3 chambers, middle chamber largest. Body silvery gray dorsally, silvery white on sides and belly (Fig. 3).

Figure 3 Dai's Bleak

The breeding season is around June to July, and the spawning ground is at the littoral of the lake where the water grass is thick. Spawning begins when the water temperature reaches 18℃ or above, usually between midnight and dawn in sunny weather. The eggs are sticky, and the fertilized eggs adhere to large water plants to develop and hatch. Fertilized eggs are 1.37 to 1.42 mm in diameter. When the water temperature is 23 to 28 ℃, after 1 day and a half can hatch.