Abstract
A large amount of red seabream Pagulus major (Temminck and Schlegel) larvae, 8.0-11.0 mm in total length, was killed by the parasitism of larval treamtode during a course of experimental culture in large scale.
Many young numerous larvae trematode were found in the alimentary canal, and a few one in the urinary bladder, ureter and renal tubule of the diseased larvae of red seabream.
The infection was presumably caused by the active feeding of red seabream larvae on the larval trematode libreated from their first intermediate host, top shell (Batillus cornutus).
