The NAGA Expedition conducted a program of marine investigations in the Gulf of Thailand and the South China Sea during the years 1960-1961. In connection with this program, a bottom fauna survey was made in the Bay of Nhatrang, South Viet Nam. Identifiable amphipods, representing 14 established species and 21 new species, were recovered from 97 of more than 360 stations sampled in the bay and form the basis of this paper.