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Peter Perschbacher*
The Blue Tilapia (Oreochromis aureus) is an important food fish and aquaculture species, very similar in appearance and food habits with Nile Tilapia (Oreochromis niloticus), distinguished primarily by lack of banding on the tail, and consuming by filtration primarily phytoplankton and zooplankton, depending on availability . Due to its ability to utilize algae, Blue Tilapia was the object of an intensive study of their impact and production in fertilized, freshwater ponds by the author. In 3-l jars, 9 g Blue Tilapia were highly efficient in removal (80-100%) of noxious algae (primarily cyanobacteria) in 24 h. This rate is similar to the efficiency of Nile Tilapia in a later similar study by the author.