427 



This is another genus of rattail fish, Halosauropsis. This rattail 

 is found fairly predominantly at the 2,800-meter site and is a 

 bottom feeder. We did not catch it at the 3,800-meter site and the 

 maximum depth of habitation for this fish may be somewhere 

 between the 2,800-meter and 3,800-meter dumpsites. 



If you consider that the international dumping recommendations 

 recommend 4,000 meters as the minimum acceptable disposal 

 depth for radioactive materials, you are seeing a very good techni- 

 cal reason for selecting that depth. You have reduced the number 

 of biological organisms and types of species found that could take 

 up and/or transport the radioactive material, thus reducing one 

 risk pathway to man. 



Next slide, please. 



(Slide No. 22.) 



Slide No. 22 



This is called a tripod fish because it sits up off the bottom on its 

 elongated pectoral fins while it waits for food to swim by. 

 Next slide, please. 

 (Slide No. 23.) 



