3 22 



THE GUIDE TO NATURE 



The "blackfish" is, strictly speaking', 

 not a fish at all, but a jet-black carni- 

 vorous, viviparous, warm-blooded 

 mammal of the Cetacean order, a mem- 

 ber of the Dolphin family, from eight 

 to eighteen feet long, weighing from 

 five hundred pounds to three tons, and 



shaped very much like a small sperm 

 whale, the head having the same square- 

 ended, sawn-off appearance. For the 

 protection of their flesh and vital or- 

 gans from the cold of Arctic waters, 

 these fish are completely enveloped in 

 a thick laver of blubber from two to 



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