Ich or fighting marks?

[JBulk09]

The tang has been in the tank for a few weeks and today just all of a sudden these appear. Anyone know anything?

 

[KJ]

@Jay Hemdal

 

[Jay Hemdal Verified Community Expert]

The tang has been in the tank for a few weeks and today just all of a sudden these appear. Anyone know anything?

Are you talking about the three sort of dark spots? Are they just on the fish's left side? Not likely ich, could be a skin reaction to flukes, but I see another tang in the background, so it could just be from fighting. If you want to take a deep dive, look at this link and answer what questions you can about your tank and we''ll see if there could be other issues:

Some Helpful Hints When Posting or Responding to Threads in the Fish Disease Treatment and Diagnosis Section

Aquarium Fish Disease Problem Solving Determining the best course of action for a problem with your aquarium can be a difficult task. Even advanced aquarists will often need to seek the help of others for complicated or unique issues. Our intent here on Reef 2 Reef is to offer expert advice...

www.reef2reef.com

Jay

 

[JBulk09]

Thanks fellas

 

[JBulk09]

Okay so its a 75 gallon reef tank total volume. I run 2 filter socks in the sump with a refugium and a octo skimmer. I also have a 15w uv and run a mini carbon reactor. There is another tang in the tank as well as a Melanarus, 2 clowns, and a fire goby.

Parameters
1.025 salinity
8.6 alk
450 cal
1450 mag
Nitrates and phosphate have always read 0

The affected mimic tang has been in the tank for 3 weeks after 2 in qt. The tomini beat him up the first day and I added a mirror to the side and he was preoccupied but since that they have been friendly.

 

[JBulk09]

I worked a double last night so I didn't do my usual inspections so it is possible it started yesterday. The wife didn't notice it tho

 

[JBulk09]

Also yes the dark spots are on just the one side however the bottom fin is dark and has a hole torn in it

 

[Jay Hemdal Verified Community Expert]

Also yes the dark spots are on just the one side however the bottom fin is dark and has a hole torn in it

I think it is from fighting, especially with the hole in the fin. You will likely not see it happen - a tang squabble can be over in seconds, and may only happen when you aren't in the room. That said, it doesn't mean the fish could have some other issue - two weeks is a very short quarantine time, and I would worry about flukes.

Jay

 

[JBulk09]

Update:
The dark spots on the tang are just gone. I dosed a 7ml of API stress coat and withing 24 hours it just disappeared

 

[JBulk09]

Update 5/2

The tang was fine up until this morning didn't eat and suddenly saw it with the cleaner shrimp and at a closer look the shrimp was eating him, not cleaning him. The tang is dead.