As the title says, my fire eel stopped eating for no obvious reason. She is 2 years old, 60sm long. Lives in a 180 gal tank. Tested the water, it's fine. I do 2 40% changes weekly. I offer the same food(small frozen sea fish we have here). No outer symptom of any illness. Other fish are fine. Even the fire eel acts normally, breaths normally, but doesn't eat. It's been 3 weeks now, so I'm getting worried. Has this happened to you? I wouldn't like to start treating with meds, but eventually I'll have to. How long do you think I can wait? She's really fat and I don't think she has lost any weight this last 3 weeks. I'm sure she doesn't eat. I only offer 1 fish every day, and even if it hits her on the nose, she pays no attention to it. Then the polys take it. She used to come out and beg for her food. Any thoughts are appreciated.