Well... Found her today belly up in the sand. I inspected her and she didn;t have any apparent issues (no holes, no frayed fins, no sunken belly, etc.). She was very near the anemones. I wonder if they might have stung her, or if Shakes and pal might have taken offense to her being in that area? Shakes is usually pretty tolerant, though. I really liked this one and hate to lose a fish...