Clownfish sick?

[Msimbana]

Hello so I've had my clownfishs for months now and in this week if noticed one of them got lighter by his tail also have noticed it's be by the lower part of the tank. It's been eating great, but want to make sure he's fine. I posted pictures of both for comparison.

 

[Qasimja]

thats definitely not normal hopefully someone with more knowledge can help

 

[Dierks]

Wow, really cool Long Finned Clownfish! Looks like bacterial infection causing the fin rot.

Bacterial Infections

Why fish get bacterial infections What You Need To Know: * Infections can be caused by either Gram‐positive or Gram-negative bacteria. Gram-negative infections are typically more virulent, and more common in marine fish. * Bacterial infections are often "secondary" to a preexisting parasitic...

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