Fig. 8. The amount of cAMP (pmol mg^-1 protein) in the sea anemone Aiptasia pulchella cold-shocked at 12°C, held at 25°C (Control), incubated in 25 mmol l^-1 caffeine at 25°C for 2.5 h or heat-shocked at 30°C for 14 h. Values are means + S.E.M., N=4. *Significantly different from the control value, P0.05.