Well he would try to chase them, but they were too quick except the watercow who stood his ground and the turtle would retreat into his shell or swim away really fast lol I've had it for about a year and a half now and the brycon sometimes dive bombs the turtles shell but it has all gone well except I hand feed turtle since he gets outcompeted or leave it on the land/dock. I dont think it's an exception, maybe because large sliders become primarily herbivorious and also because I have fast fish and aggressive fish maybe?
I have seen sliders take down 16" bass at that size