40 

 or unreported. 



Results of Some Other Biological Observations 



A fish-kill in June 1956, resulting in the death of 

 several hundred tons of fishes, along the shallow beaches 

 of Santa Monica Bay was found to have been caused by the 

 discharge of large volumes of scalding water by the 

 Edison power plant* The fishes examined were surf- 

 perches and measured 3 to 5 inches long. 



The use of current meter lines along outer parts of 

 Zone I resulted in occasional catches of the large sand 

 sea-star, Astropecten calif ornicus , with commensal poly- 

 chaetes, Arctono^ and Podarke, both of which do not occur 

 with their host in the more immediate environs of the 

 effluent outfall. The fire-body, Pyrosoma atlanticum 

 ( a colonial tunicate), was occasionally snagged on lines 

 during the summer months^ 



Lobster traps baited with dead fish were set at 

 varying distances from the outfall, with the following 

 results. On one line extending 1.2 to 3 miles from the 

 Hyperion stack, in depths of 10 to 25 1/2 fathoms, traps 

 were dropped in the evening and pulled up in the morning. 

 The stations were those of the VELERO IV numbered 4448-56 

 to 4451-56, 



Station 4448-56, in 60 feet. 



Bursa calif ornica « the frog snail; two larger 

 sand dab fishes; 9 Astropecten calif ornicus ; 



