Weird red spot on my clownfish

[Scarfoot]

My clownfish developed this one week after moving to my tank. The tank was cycled for 3 weeks and the fish were introduced as the first and only fish in the tank along with a few astreas snails and hermit crabs. This is end of week 4. Any thoughts on what's happening? Should I be worried?https://www.reddit.com/r/ReefTank/s/odx4Jni9FV

 

[vetteguy53081]

My clownfish developed this one week after moving to my tank. The tank was cycled for 3 weeks and the fish were introduced as the first and only fish in the tank along with a few astreas snails and hermit crabs. This is end of week 4. Any thoughts on what's happening? Should I be worried?https://www.reddit.com/r/ReefTank/s/odx4Jni9FV

This clown is a victim of intimidation of aggression and other clown should be isolated for 10-14 days to see if this behavior continues hen returned to the tank

 

[Scarfoot]

Thank you. I only have A 15g hello reef tank. Should I get a isolation box for the tank? Or if there is a better alternative.

 

[vetteguy53081]

Thank you. I only have A 15g hello reef tank. Should I get a isolation box for the tank? Or if there is a better alternative.

isolation box should be fine

 

[Jay Hemdal Verified Community Expert]

My clownfish developed this one week after moving to my tank. The tank was cycled for 3 weeks and the fish were introduced as the first and only fish in the tank along with a few astreas snails and hermit crabs. This is end of week 4. Any thoughts on what's happening? Should I be worried?https://www.reddit.com/r/ReefTank/s/odx4Jni9FV

The tissue loss of the gill plate and rapid breathing indicates something severe is going on here. After isolation, I would also dose Neoplex or other broad spectrum, gram negative antibiotic.