Chapter VII 



LIFE AT AND NEAR THE SURFACE 



Strange and interesting as is the life in the 

 great depths of the sea the creatures which 

 dwell in the water itself, and on the bottom 

 at moderate depths, are fully as interesting. 

 Within the ocean there is not one, but many 

 worlds of life and while the denizens of one 

 of these submarine worlds may sometimes 

 travel to another, or may be common to sey- 

 eral, yet, on the whole, each individual spe- 

 cies lives and dies under certain conditions and 

 in a certain depth of water. Near the shores 

 and between high and low water mark is one 

 world of marine life; in shallow water, but 

 never left bare by the tides, is a second world; 

 at a greater depth is still another and so in 

 deeper and deeper water other worlds occur 

 until the very deepest waters of the seas are 

 reached. 

 In addition to these various zones of life, 



122 



