This study monitored the morphological development of embryo, larvae and juvenile yellowtail kingfish, Seriola lalandi, for their aquaculture. The fertilized eggs obtained by natural spawning were spherical shape and buoyant. Fertilized eggs were transparent and had one oil globule in the yolk, with an egg diameter of 1.35 ± 0.04 mm and an oil globule diameter of 0.32 ± 0.02 mm. The fertilized eggs hatched 67–75 h after fertilization in water at 20 ± 0.5°C. The total length (TL) of the hatched larvae was 3.62 ± 0.16 mm. During hatching, the larvae, with their mouth and anus not yet opened. The yolk was completely absorbed 3 days after hatching (DAH), while the TL of post-larvae was 4.72 ± 0.07 mm. At 40 DAH, the juveniles had grown to 30.44 ± 4.07 mm in TL, body depth increased, the body color changed to a black, yellow, and light gray-blue color, and 3–4 vertical stripes appeared. At 45 DAH, the juveniles were 38.67 ± 5.65 mm in TL and 10.10 ± 0.94 mm in body depth. The fish were green with a light orange color, with 7 faint green-brown stripes on the sides of their body. At 87 DAH, the juveniles had grown to 236.11 mm in TL, 217.68 mm in fork length, and 136.5 g in weight. The fish resembled their adult form, with a light yellow-green body color, loss of the pattern on the sides of their body, and a yellow coloration at the tip of the caudal fin.

INTRODUCTION
 MATERIALS AND METHODS
  1. Acquisition of fertilized eggs
  2. Egg morphology and development
  3. Management of water quality and supply of feedfor seed rearingFor the rearing of
  4. Observing the morphological development ofjuveniles
 RESULTS AND DISCUSSION
  1. Egg morphology
  2. Embryonic development
  3. Morphological development of larval and juvenileyellowtail kingfish (S. lalandi)
  4. Larval behavior and rearing management
 REFERENCES

• Sang Geun Yang(Jeju Fisheries Research Institute, National Institute of Fisheries Science, Jeju 63610, Korea)
• Sang Woo Hur(Marine Science Institute, Jeju National University, Jeju 63333, Korea)
• Seung Cheol Ji(Jeju Fisheries Research Institute, National Institute of Fisheries Science, Jeju 63610, Korea)
• Sang Gu Lim(Jeju Fisheries Research Institute, National Institute of Fisheries Science, Jeju 63610, Korea)
• Bong Seok Kim(eju Fisheries Research Institute, National Institute of Fisheries Science, Jeju 63610, Korea) | Bong Seok Kim1
• Chi Hoon Lee(Jeju Fisheries Research Institute, National Institute of Fisheries Science, Jeju 63610, Korea)
• Young-Don Lee(Marine Science Institute, Jeju National University, Jeju 63333, Korea) Corresponding Author
• Minhwan Jeong(Jeju Fisheries Research Institute, National Institute of Fisheries Science, Jeju 63610, Korea)