Both a 3" chrysurs from divers den back in November. Healthy and growing for 10 months. Came back from short trip and he was AOL. Found part of remains yesterday. I used nearly 100% new LR to start tank so I don't think I have any nasties in tank. I did but a clean up crew that included emerald crabs but I can't imagine they would be big enough to catch a 4"+ angel. What can cause this type of sudden with no symptoms before. I also lost a smaller regal about 2 months ago same circumstances. What do you think, flukes?