Sick Clownfish

[Deathling]

I bought this clownfish 5 days ago, initially noticing a small, flat, red dot on his lower jaw and thinking it was a birth mark. Each day it has become more imflammed/enlarged, he has been eating consistantly and behaving normally untill today where he is quite reserved and timid. Additionally noticed today he opens his mouth more frequently.

 

[Big G]

The red spot evolving into that dark growth sounds like a bacterial infection. For infections of the mouth/head area have had very good results treating with both Sulfaplex + Neoplex.