Penelope loves to play during water changes, circling my hand and swimming through my fingers. A couple of water changes ago, she was circling like normal when suddenly her demeanor changed, and I knew what she was going to do right before she did it. She lunged forward super quick and bit me! She must have been thinking about doing that for months. I like to call her my little shark now.
Penelope is a pretty funny fish in general, she loves to stare at my roommate and when I'm gone in the morning she swims over to watch her sleep. Creeps her out every time, when she wakes up to find Penelope stock still and with her eyes fixated on her, especially considering that Penelope usually never stops moving when there are people in the room. I find it quite funny, can't help being proud of her for this. :) She takes after me for sure.