Also known as Cuttlefish (Moyu), it has a preference for darkness. It expels ink from its abdomen to mix with the water for self-defense. When crows see it, they believe it is dead and go to peck at it; the cuttlefish then curls up, takes them into the water, and eats them. Hence, it is called "Wuzei" (Crow Thief). Its bone is named "Haibiao Xiao". It tastes salty, is slightly warm in nature, and is non-toxic. It treats sores with excessive pus that do not dry out. For men with chronic ulcers on the glans penis that fail to heal, applying the powdered form externally is effective. For women with erosion, swelling, and pain of the vulva, it should be burnt to ash, powdered, and taken with wine. It also treats deafness with fluid retention, red and white films in the eyes, floating nebulae with tearing, and pediatric malnutrition eye disease (Gan Yan). It stops dysentery; when powdered and mixed with porridge for consumption, it is effective. It kills small insects and aquatic parasites. It treats abdominal pain surrounding the umbilicus caused by fright qi entering the abdomen, and edema. It primarily treats metrorrhagia and leukorrhea (Beng Lou) in women. It addresses blood deficiency amenorrhea with alternating chills and fever, blood stasis and abdominal masses (Xue Jia), and infertility due to cold in the genital region. In processing, boil in water for one shichen (two hours), roast until yellow, remove the skin, grind finely, process by water flotation (Shui Fei), and dry in the sun. It is incompatible with Bai Lian (Ampelopsis Radix), Bai Ji (Bletillae Rhizoma), and Fu Zi (Aconiti Lateralis Radix Praeparata). The ink inside the abdomen treats stabbing heart pain caused by blood stasis; grind with vinegar and take orally. For severe cases, roast with vinegar and take. The meat tastes sour...