We have a three-year-old female RES who has rocks of different sizes as strata in her tank. We've had her since she was tiny. The last few weeks, she has been very interested in one of the larger rocks in her tank. She goes to the bottom and gets "nose-to-nose" with it and stays there for several minutes. This evening, she gathered up the larger rocks and sat on top of them at the bottom of the tank. Almost like nesting. We know she's never been near a male RES. Does this behavior saound familiar to anyone? Thanks.

