Blenny with tumor over one eye

[BlueReef114]

Hi everyone,
My blenny has this tumor like growth over one eye that’s getting bigger each day. He’s still eating. I treated with rally pro for 5 days, no difference. I have a 20 gallon mixed reef with 2 clowns and corals. Any ideas?

 

[vetteguy53081]

Hi everyone,
My blenny has this tumor like growth over one eye that’s getting bigger each day. He’s still eating. I treated with rally pro for 5 days, no difference. I have a 20 gallon mixed reef with 2 clowns and corals. Any ideas?

This may have stemmed from an injury and in 45 yrs of reefing… a first I have seen something like this and I don’t believe treatable as Maracyn often resolves many eye issues but this may be extreme

@Jay Hemdal

 

[Jay Hemdal Verified Community Expert]

Hi everyone,
My blenny has this tumor like growth over one eye that’s getting bigger each day. He’s still eating. I treated with rally pro for 5 days, no difference. I have a 20 gallon mixed reef with 2 clowns and corals. Any ideas?

Welcome to Reef2Reef!

The picture isn't super-clear, but it seems to be what I call the "Unknown Vesicle Disease" or UVD. The cause is not known, and some fish recover, but others do not. Here is a write-up I did on that: (you need to open the PDF file to the right or below the file description)

Article 'Unknown Vesical Disease'

This article describes an issue termed the “Unknown Vesicle Disease” (UVD). It is characterized by one or more clear to translucent fluid-filled “bubbles” on the skin of certain species of fish. The cause of these vesicles is unknown. The outcome of infected fish varies; in some cases, the...

• Jay Hemdal
• Aug 18, 2025
• 1 min read
• Reaction score: 6
• Category: Fish Disease and Treatment
• disease fish vesicle