The effect of water salinity at 0- 30 ppt on hatching success was conducted in 10-liter glass aquarium (water volume 5 liters) containing 50 eggs. Fertilization rate at 0, 5, 10, 11, 12, 13, 14 ppt were 69.33, 72.67, 71.33, 72.00,  82.00, 77.33 and 10.67%, respectively. However, time of hatching out was lowest at 5 ppt. Besides, we evaluated the tolerance of snake head fish larvae in different salinity within 24 hour and it were done in 8-liter glass aquarium (water volume 4 liters) containing 20 larvae which size of each fish were 2.5 cm in length. The survival rate of fish larvae was 0, 5, 10, 15, 20, 25, 30 ppt which were 100, 100, 100, 100, 0, 0, 0 %, respectively. The time for fish can survive were 20, 25, 30 ppt which were 100, 60, 50 minute, respectively.

Tolerance of snake head fish larvae in different salinity (0-30ppt) within 24 hour were also done in 8 –liter glass aquarium (water volume 5 liters) containing 20 larvae. The survival rate of fish larvae was 16, 17, 18, 19, ppt which were 0, 0, 0, 0 %, respectively. The time for fish can survive were 16, 17, 18, 19 ppt which were 1260, 240, 170, 140 minute, respectively.