Fig. 6. Confocal microscopy of an Acridine Orange-stained living cyprid cement gland. The larva was immobilized on a cover slip using Kwik Sil and imaged. (A) Unstimulated cement gland within the living cyprid. (B) The cyprid was stimulated with dopamine (1 mmol l^–1) and imaged 15 min later. Note the brightly stained secretory vesicles in the control gland (A) and their loss and the appearance of large vacuoles after stimulation.