To determine the nutrients contents in Miichthys miiuy muscle and by-products. The contents of moisture in Miichthys miiuy muscle and by-products were 79.65%, 69.15%; crude protein were 18.65%, 19.36%; crude fat were 0.24%, 3.90%; and crude ash were 1.15%, 3.75%, respectively. Total amino acids (TAA) contents of Miichthys miiuy muscle and by-products were 18.58%, 15.47%, and essential amino acids (EAA) contents were 7.65%, 5.52%, respectively. However, only EAA/TAA (41.17%) and EAA/non essential amino acids (NEAA, 69.99%) of Miichthys miiuy muscle met FAO)/WHO standard for protein profile. According to amino acid score (AAS) and chemical score (CS), methionine was the first limited amino acid in Miichthys miiuy muscle and by-products. The essential amino acids index (EAAI) of Miichthys miiuy muscle and by-products was 89.07, 61.78, respectively. The contents of butyric acid, palmitoleic acid, oleic acid, nervonic acid, docosahexaenoic acid (DHA), magnesium (Mg), calcium (Ca), potassium (K) and iron (Fe) were high in Miichthys miiuy muscle and by-products. Miichthys miiuy muscle and by-products are kinds of nutrition rich food source with high content of protein, low content of fat and high contents of mineral.