The investigated of survival rate, sex ratio, condition index, gonad development frequency, gonad index, fertilization rate, hatching rate and time required development of D shape larvae of the ark shell, Scapharca subcrenata. Survival rate was lower in heating group compared with control group(P < 0.05). Sex ratio(female:male) observed 1:0.97 in control group, 1:0.62 in heating group. Condition index was significantly higher in heating group than control group(P < 0.05) and higher increased more than water temperature 17℃ of heating group. Gonad development observed slow in control group but more than ripe stage 80% in heating group(21-28 day, 20℃). Gonad index was higher in heating group compared with control group(P < 0.05). Fertilization rate and hatching rate of the ark shell was observed 82.17 ± 3.55% and 63.57 ± 2.36%, respectively. The time required development of D shape larvae of the ark shell was observed 15 hour after fertilization. The suggested that results of the ark shell by heating were effective sex maturation and normal egg development.