LIFE OF THE SEA 531 



Life of the Sea. The plants living in the sea are nearly 

 all of a low order. The mangrove trees which border some 

 tropical shores represent their highest type. The most 

 abundant of sea plants, the seaweeds, have no flower or 



DIFFERENT KINDS OF SEAWEED 



seed or true root, although most of them have an anchoring 

 device by which they are attached to the bottom. Their 

 food is absorbed from the surrounding water. They have 

 developed little supporting tissue, but instead have bladder- 

 like air cavities or floats, which enable them to maintain 



