Abstract
After 15 months' rearing in brackish water (Cl: 2.82-3.75‰), Monodactylus sebae (Cuvier) spawned repeatedly.Spawning activity was observed from evening to midnight.The interval of the spawning was five to 10 days, and the number of eggs fluctuated at a cycle from 18 to 28 days.The eggs were round, isolated and floating but sunk to the bottom in fresh water.They hatched out 20 hours after fertilization at 25°C The optimum salinity for the development of eggs and larvae was 25% sea water (Cl: 4.59-4.64‰).The larvae were elongate in shape during the prelarval stage, and became higher from the 23rd day after hatching and on.The fin rays attained the specific numbers by the 33rd day.
