Gonyaulax polyedra 



THE PROBLEM 



Investigate factors in the marine biological environ- 

 ment which pertain to underwater sound; identify and study 

 organisms affecting sound attenuation, scattering, reflection, 

 and ambient noise level; measure the effects of these orga- 

 nisms on underwater sound. Investigate the distribution of 

 these organisms in space and time to gain an understanding 

 of their fluctuations in critical areas of the ocean. 



Specifically, determine the influence of planktonic 

 organisnas on the transmission of light in the open sea. 



Gymnodirdum flauian 



MBL/WHOI 



D 03D1 DDMD512 E 



