jelazar
Active Member
Our beautiful naso tang has been in our tank about a year and has thrived, until about an hour ago.
- He appears disoriented and sometimes swims on his side. He swims into the wall a little harder than usual. Respiration rate is high. When he gets tired he'll lay nose down, belly up, on the sand in the corner.
- When he recovers some energy, he'll swim normally for a bit, then slowly roll 45 degrees or more to either side before dashing across the tank as though being chased (he's not). He smashed into a millepora hard enough to break off several branches.
- He doesn't float around at the surface, or struggle to maintain height. None of the fish show any physical (spots, etc.) or behavioral (swimming into flow, avoiding light, flashing, clamped fins, etc.) symptoms of ich/brook/velvet/flukes.
Tank aggression is a 4 on a 1-10 scale, and the naso is not bullied. Food is good quality, varied, and frequent. I feed a sheet of red nori several times a week, mysid pellets daily, and frozen food daily. Water quality is very good. I know what underfed fish look like, and the fish all have good body weight.
As background, I rigorously quarantined everything wet before adding to the tank. All fish went through FW dip, prazi, CP or copper, and metro. All corals/rock/sand etc. went through 76 days in a fish-free quarantine tank.
Has anyone seen this sort of behavior before and know what the cause is? I don't want to remove the fish and cause further stress unless I know what I'm trying to fix.
- He appears disoriented and sometimes swims on his side. He swims into the wall a little harder than usual. Respiration rate is high. When he gets tired he'll lay nose down, belly up, on the sand in the corner.
- When he recovers some energy, he'll swim normally for a bit, then slowly roll 45 degrees or more to either side before dashing across the tank as though being chased (he's not). He smashed into a millepora hard enough to break off several branches.
- He doesn't float around at the surface, or struggle to maintain height. None of the fish show any physical (spots, etc.) or behavioral (swimming into flow, avoiding light, flashing, clamped fins, etc.) symptoms of ich/brook/velvet/flukes.
Tank aggression is a 4 on a 1-10 scale, and the naso is not bullied. Food is good quality, varied, and frequent. I feed a sheet of red nori several times a week, mysid pellets daily, and frozen food daily. Water quality is very good. I know what underfed fish look like, and the fish all have good body weight.
As background, I rigorously quarantined everything wet before adding to the tank. All fish went through FW dip, prazi, CP or copper, and metro. All corals/rock/sand etc. went through 76 days in a fish-free quarantine tank.
Has anyone seen this sort of behavior before and know what the cause is? I don't want to remove the fish and cause further stress unless I know what I'm trying to fix.
