Fig. 9. A part of the algal plain 100 m from the face of the reef, 

 lightly grazed by fishes. Conspicuous plants in this area 

 include Avrainvillea, Udotea , Penicillus , Lobophora , 

 Caulerpa , and Halimeda . 



Fig. 10. Isolated rock lump, one of many scattered over the algal 

 plain, supporting growth of Avrainvillea and other algae, 

 and providing cover for numerous small fishes. 



VI-140 



