72, THE HAUNTS OF LIFE 
bours countless animals of many kinds, which 
play hide-and-seek among the fronds. 
It is interesting to learn that the animals 
that live in the Sargasso Sea, instead of being 
predominantly blue and grey, are clothed in 
reds, browns, and dull greens, like the weed 
among which they hide, and they have these 
colours even when their relatives in the open 
sea are blue. Some of them have the body 
reddish-brown, but the fins, which have to be 
spread out in the open water, are blue. It is 
thought that the amount and intensity of light 
have a great deal to do with developing the dif- 
ferent colours of animals at different levels of 
the ocean, but, whatever be the cause of them, 
there can be no doubt that their effect is often 
to secure greater safety for their possessors. 
THE ANIMALS OF THE OPEN SEA 
Can we call the roll for the Open Sea? 
There are many different kinds of Infusorians, 
among which there is the world-wide giant, 
Noctiluca or Night-Light, which makes the 
waves sparkle in the summer darkness. A 
giant indeed, for it is about the size of a pin- 
head. Many of the chalk-forming animals or 
