10 



28''oo' 



50 



4 0' 



30 



AFFECTED AREA 



(Aerial and vessel survey) 



OCTOBER 3.1957 



= DISCOLORED WATER 



WWW = DEAD FISH 



= AREA SURVEYED 



_L 



sa'co' 



50" 



40 



30' 



Figure 8. — Survey of red tide occurrence on October 3, 1957, 



48 



