I’m more of a coral guy than a fish guy and have no experience with fish diseases. I have a 40b with a maroon clown and a watchman goby. The last two fish I had were a damsel (lasted 3 days) and a six line (lasted 3 weeks). After looking at every option on what is going wrong with newly introduced fish my best guess is the clownfish attacked but I didn’t see any signs of torn fins or aggression. The symptoms of both fish were gasping for air and they both died within a day of the symptoms there was no spots or red gills. My clown attacks my hands but I’ve never seen aggression towards other fish, the clown and sixline literally swam together All day long like they were friends. I had no major parameter problems other than .25 ammonia and my clown and watchman are complely Fine which makes me think there was no parameter issue or disease. The wrasse was bigger and faster than the clown I don’t see why it would have gotten attacked. Wouldn’t the fish have shown symptoms of disease longer than a 6-10 hours? I also heard damsels are extremely hard to kill and it died. Please help me get to the bottom of this!
Picture of wrasse In it’s final moments.
Picture of wrasse In it’s final moments.