In the present study, the fecundation and fertilization behaviors of the trumpet shell, Charonia lampas sauliae were observed from November 2003 to March 2004. Female has multiple fecundation and multiple fertilization, and the fertilization continued for two days. The fertilized female stayed with the egg mass to protect the eggs, and the fecundation was made during the fertilization. The highest survival rate of egg capsule was 60% at 15℃. Charonia lampas sauliae fed with Chaetoceros calcitrans, Isochrysis galbana, and Pavlova lutheri. Growth and survival rates of C. lampas sauliae in the conditions of various water temperature were observed. The highest survival rate was 23% at 15℃ reared for 60 days. The growth was presented in the 15℃ group, with shell length from 408 ± 21.52 μm to 625 ± 19.76 μm during the experiment.