2l6 FISHES FOR THE MARINE AQUARIUM. 



Its popular name is derived from the singular change 

 which affects the male at the breeding season, when 

 the silvery scales are overspread by a sooty blackness. 

 As a matter of course, that magnificent fish the 

 sturgeon (Acipenser sturid) is to be seen alive at the 



Fig. 145. 



Sturgeon (Acipenser shirto). 



Manchester, Brighton, and most public aquaria of 

 importance. One at Manchester was nearly 9 feet 

 in length and 4 feet in girth, and was the biggest 

 introduced. It became excited, however, at the 

 smallness of the space allowed it, in comparison to 



