Ip, Y.K., A.M. Loong, K.C. Hiong, W.P. Wong, S.F. Chew, K. Reddy, B. Sivaloganathan and J.S. Ballantyne. 2006. Light induces an increase in the pH of, and a decrease in the ammonia concentration in the extrapallial fluid of the giant clam Tridacna squamos