TABLE 2. BIOLUMINESCENCE OBSERVATIONS. 



DIVE NO. 61 (DESCENDING AND ASCENDING) 



Depth (feet) 



(Uncorrected 



^auge readings) 



42 00 



4800 & 

 5400 



6000 



6900 to 

 10, 500 



12, 300 



13, 800 



Approximately 1 flash per 1/2 meter^ . 

 Usually single points. One fairly large 

 disc- shaped object with numerous 

 points of light. 



Amount of bioluminescence remains 

 approximately uniform. 



Bioluminescence much reduced; only 

 isolated points observed. 



Virtually no bioluminescence present. 



Single point, water virtually clear of 

 suspended material. 



No bioluminescence observed since 

 12, 300 feet. Release of ballast incites 

 no bioluminescence. 



17,400 



17, 700 



18, 000 



18, 450 



Amount of suspended material has 

 increased to a high quantity. Particles 

 reflect white. Most are inanimate. 

 Size average 1/8 inch, two are 3/8 

 inch. One pteropod observed. 



One mysid. Considerable amount of 

 material in water. Isopod (?), white, 

 1/2 inch, swimming while in vertical 

 position. 



Pelagic annelid, Tomopteris sp. , 

 2 1/2 inches, 1 inch wide including 

 parapodia, body 1/2 inch or less. 

 Two pteropods. 



One mysid, 1 inch long, 

 in suspended animation, 

 medusa. 



resting quietly 

 11/8 inch 



36 



