Earlier my wife apparently witnessed the more submissive of our two turtles (still figuring out their genders) 'fluttering' at the more outgoing one.
Like this; http://exoticpets.about.com/od/aquatict ... wflutt.htm
My wife says she saw this twice. We've never witnessed it before, but we see it can be a sign of dominance. Is it just done for show, or is it serious? Is it maybe time to separate them?

