Plankton, Kunzhong and mollusk in the water are often used as the main bait. Wild leeches have a wide range of food habits, including benthic mollusks such as snails, mussels, shellfish and their larvae, fish, insects, Daphnia and other organisms, aquatic chrysanthemum filaments and nutrient-rich humus.
2. Leech, commonly known as leech, is recorded in Shennong Herbal Classic and has high medicinal value; It grows and breeds in inland freshwater areas and is a traditional special medicinal aquatic animal in China. Its dried product can be used as traditional Chinese medicine after soaking, and has the effects of treating apoplexy, hypertension, blood stasis, amenorrhea and traumatic injury.