So with the shelter at home my hands have been in the tank a lot more, and I guess my yellow tang finally had enough. She has started backing up waving her tail at my hand and I so far have managed to pull my hand out just in time before she can cut me. She gets along great with her tank mates (because she is the only tang in the tank). Is this a sign she’s outgrown the 5’Lx20W” tank?