Aquaculture clownfish looking sick

Rawsreef · Oct 27, 2025

Got these guys a few weeks ago, both were looking great. Eating regularly and acting normal. I have not seen any aggression from either of them.

This morning I noticed one of the clowns is looking pale, and overall unhealthy. This change happened overnight as it was looking completely normal yesterday.

Only other fish in the tank is a yasha goby and a half inch candy cane pistol. These guys are in their burrow, and I highly doubt any aggression came from them.

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vetteguy53081 · Oct 27, 2025

Rawsreef said:
Got these guys a few weeks ago, both were looking great. Eating regularly and acting normal. I have not seen any aggression from either of them.

This morning I noticed one of the clowns is looking pale, and overall unhealthy. This change happened overnight as it was looking completely normal yesterday.

Only other fish in the tank is a yasha goby and a half inch candy cane pistol. These guys are in their burrow, and I highly doubt any aggression came from them.

Photo:

Video :

Besides the clown being thin, it shows signs of brooklynella disease. The most significant sign is the amount of slime on its body which is noticeable on the fish. This mucus generally starts at the facial area as well as gills and spreads across the body producing lesions as it progresses often confused with ich and can turn into secondary bacteria. Other symptoms will be lethargic behavior, refusing to eat and heavy breathing from the mucus.
Typical treatment is a formalin solution is mixed with in a separate container with either fresh or saltwater. Start with a prolonged 60 minute bath of ruby rally pro then at a lower concentration in a quarantine tank. The longer the fish are exposed to the treatment, the more effective it will be at eliminating this issue.
Temporary relief can be achieved by giving the fish a FW bath or dip in water same temperature as display tank. Even though this treatment will not cure the disease, it can help to remove some of the parasites, as well as reduce the amount of mucus in the gills to assist with respiration problems.
Treatment is best done in a QT tank using Ruby Rally Pro. Ruby takes a little longer and initial treatment generally takes 2-3 days to really start going to work.