Functional morphology and behavior of early life stages of red sea bream.

Larval red sea bream were reared in the laboratory to describe the development of organs and behavior, and their implications on early life stage. Transformation from post-larval to juvenile stages occurred when fish attained 7.6mm SL to 8.6mm SL; 25 to 29 days after they were hatched. During this phase, organogenesis occurred internally, and subsequent developmental stages were observed externally.With the functional development of the various organs, fish behaviors particularly swimming speed, increased remarkably. In the wild, change in fish habits was also found as the individuals developed.Consequently, it is considered that the morphological development and organogenesis were closely implicated with the change in the life style of the red sea bream.