Observe the tentacles of the hydrozoans and bryozoans. Feed the hydra brine shrimp and observe the feeding response. Examine an encrusting bryozoan. Then examine nematocyst discharge under a compound scope by first focusing on an acontium, then put a drop of HCl with methylene blue next to the side of the coverslip, which will diffuse across the coverslip and cause the nematocyst to fire while you are watching. Describe the process of nematocyst discharge.
Diagrams are the best way to explain discharge.
Examine the life cycle slides for Aurelia . Speculate on some of the advantages of having this type of life cycle.