Abstract: One mesopelagic fish specimen has been collected in May, 2021, from the South China Sea (SCS). Checked with morphological characters it is identified as Kali kerberti. The genus Kali belongs to family Chiasmodontidae in order Perciformes. The diagnosed characteristics are read as follows, body elongate, laterally compressed, mouth large, premaxillary and dentary teethes two rows and the internal row recurved and flanged, bony projection at tip of chin absent, body naked, dermal spinules absent. The characteristics of K. kerberti are identified as cranium with fragile bones, upper and lower jaws strongly curved, gill rakers present, teeth in mesial series of premaxilla and dentary remarkably elongated, fang-like, teeth in mesial series of premaxilla 5-6, including 4-5 fangs, mesial row of dentary teeth 4-5. This is the first time that the specimen of K. kerberti ever collected from the SCS and also the first record of genus kali and species K. kerberti in SCS. This work provides information for further study of the Chiasmodontidae in SCS.