Abstract:

A histological examination was made on the development of digestive system in larval and juvenile starry flounder Platichthys stellatus Pallas from 1 day to 35 days. In 3 days, the digestive tract in the larvae was formed but no food was intaken when the starry flounde was in endotrophic stage. In 3-5 days , the mixotrophic stage which was the transition from endo- trophic stage to exdoerophic stage, the yolk was absorbed fairly well and disappesred , while the digestive tract was differentiated into six portions: buccopharynnx, soesophagus , stomach , anterior- middleinte- stine , posterior intestine and anus. The larval digestive system was morphologically ready to be absorbed to food at this time. Then , these digestive tract and associated glands became mature gradually with the development. Gastric glands were observed in 16 days , which indicates he was a kind of fish faster development.