Post-larvae were fed a uni-algal Žbut not axenic. strain of Nitzschia longissima
This diatom is ruptured during ingestionrdigestion,
and gives good growth of post-larval H. iris Diatoms were
grown at 178C in Jørgensen’s medium, supplemented with 0.05 mg ly1 vitamin
B . Growth medium was replaced with FSW containing antibiotics immediately before 12
post-larvae were transferred onto the diatom culture.