BM :

YP are a simi-cold water fish unlike RES. YP can thrive and eat and etc. in winter water. They would have the advantage over the RES for a lot of the year in Bruce's ponds. YP have been found to be seriously munching on small BG all winter in the north waters. They can handle Bruce's water easily if acclimated correctly and keep right on growing. In fact it is the waters warm status in small ponds in summer that would be the bigger problem. Then the BG and RES would have the advantage. \:\)

That cross would be scary with red teeth and red pharyngeal crushers and yellow eyes and the ability to grow year round in hot or cold water --- hhmmm -- a real pond terror. And remember that some of the YP were subject to being boiled alive and thus have a real mean streak to them. \:D