I think sowilu means the standard giant 'betta splendens' that's been around for a few years. They're twice as big as a standard betta.
http://www.bettysplendens.com/articl...articleid=1405
cool, I found the link for story on the origins of the giant betta.
http://worldofbettas.onediscussion.n...Bettas-p39.htm