Distribution pattern and behaviour of both wild and reared juveniles of red sea bram, Pagrus major, were studied in a nursery ground at Morode Cove using scuba, during the summers of 1992 and 1993. Two types of juvenile distribution were observed; solitary and aggregation types. Most of the wild juveniles were solitary, occupying a territory of a mean area of ca. 3.5 m2. Wild individuals could identify fish species whose feeding habits are similar to or different from theirs and consequently change their territorial behaviour towards the species. Artificially reared juveniles formed large aggregations just after their release into natural waters. Several days after their release, individuals gradually dispersed and solitary individuals showing territorial behaviour began to appear. Tilting and non-tilting artificially reared juveniles showed no clear difference in behavioural aspects after release. The tilting behaviour as an indicator of the seed quality should be reconsidered.