B-4 

 BIOTOPE 



(Habitat) 



BLOODWORMS 



Midge fly larvae . Many of the species have 

 hemoglobin in the blood causing a red color 

 and are often associated with rich organic 

 deposits. Also, the common name for certain 

 of the marine segmented worms (class Polychaeta) . 

 (See Sludgeworms ) 



BLOOM 



A readily visible concentrated growth or 

 aggregation of minute organisms, usually 

 algae , in bodies of water. 



BRACKISH WATERS 



Those areas where there is a mixture of fresh 

 and salt water; or, the salt content is 

 greater than fresh water but less than sea 

 water; or, the salt content is greater than 

 in sea water. 



