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FAQs about Yellow Tang Disease/Health 13

FAQs on
Yellow Tang Disease: Disease 1, Disease 2, Disease 3, Disease 4, Disease 5, Disease 6, Disease 7, Disease 8, Yellow Tang Disease 9, Yellow Tang Disease 10, Yellow Tang Disease 11, Yellow Tang Disease 12, Yellow Tang Disease 14, Yellow Tang Disease , & Paravortex/Black Spot Disease,
FAQs on Yellow Tang Disease by Category: Diagnosis, Environmental, Nutritional, Trauma, Pathogenic (infectious, parasitic), Social, Genetic, Treatments

Related Articles: Yellow Tangs,

Related FAQs: Best Yellow Tang FAQs, Yellow Tangs 1, Yellow Tangs 2, Yellow Tangs 3, Yellow Tangs 4, & Yellow Tang FAQs: Identification, Behavior, Tang Behavior, Compatibility, Selection, Systems, Feeding, Reproduction, & Purple Tangs, Striped Sailfin Tangs, Zebrasoma Tangs, Zebrasoma Identification, Zebrasoma Behavior, Zebrasoma Compatibility, Zebrasoma Selection, Zebrasoma Systems, Zebrasoma Feeding, Zebrasoma Disease, Zebrasoma Reproduction, Surgeons In General, Tang ID, Selection, Compatibility, Systems, Feeding, Disease, Fish Worms Diseases,

Surgeonfishes: Tangs for  Marine Aquariums
Diversity, Selection & Care

New eBook on Amazon: Available here
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by Robert (Bob) Fenner

Algae in tang barb      6/6/2015
Good day! I was cleaning the office tank of algae(was ill for a few weeks and am the only tank tender) and a few days later I noticed something caught on the yellow tangs' barb.
<Actually... appears to be some sort of post caudal peduncle spine injury.
Try blowing up the image as I have... is there another fish there that it "spars with" at times?>
It looks to be a piece of algae and I am not sure of the best way to remove it without undue stress to "Bubbles".
<I would NOT try to remove this... instead simply do your best to provide "good conditions" (nutrition and water quality mostly), and this injury will heal in time>
The tang does not appear to be bothered by it and has not been flashing.
Your input would be greatly appreciated. I have attached photos and hope they are helpful.
Thank you
Kellie Kyser
<Thank you for sharing. Bob Fenner>

Re: Algae in tang barb       5/8/15
Good day again! I have not observed any sparring with the tank mates.
<Mmm; now I see the tang/barb itself appears to be broken (happens, and some folks/collectors purposely snip off... with nail-clippers... to prevent the catch from slashing each other)... will grow back>
There are 2 mated clowns, 2 Pajama Cardinals and 1 Flame Angel. However, what goes on behind closed waters is another story. I have noticed that what is in /on barb appears to be growing and it sways with motion. I have blown up the pictures but the quality isn't very good. I will attempt better close up pictures if needed. My boss purchased PraziPro but I am reluctant to use it.
<... for worms? Not to use>
Thank you for time and input.
Kellie Kyser
<Again, I urge (simple) patience here. Bob Fenner>

Growth on tang barb     6/27/15
Hi Bob..here are updated pictures of the (?) on the tang barb.
<11 Megs?!>
Again I apologize for the poor quality (the little bugger is quick!) Your answer to my prior emails was a possible damaged barb.
<Will change my mind. This appears to definitely be filamentous algae growing on the tang>
What ever is on there is definitely growing, is green in color and is attached by 2 thin strands. When the fish turns, it almost appears to not be attached. I added pictures from when it was smaller for growth comparison.
I have done water changes and made sure parameters are within specifications. The diet includes San Francisco Bay Salt Water Multipack (mysis/brine shrimp, veggies and squid) Ocean Nutrition 2 pellets, live mysis shrimp, Nori sheets and live ghost shrimp for special treats (they love the thrill of the chase).
Thank you again for your help. Your site is a wealth of information.
Kellie Kyser
<Well; can; you could... catch this fish in a net, pull off the algae. Do take care as it's really easy and painful to get slashed. I have collected thousands of Yellows (in Hawaii) and some folks do make a practice of clipping (with small finger nail clippers) Acanthurid tangs... to prevent slashing of crowded specimens enroute and holding... Can be done safely; and the white tang will regenerate. Bob Fenner>

Re: Growth on tang barb       6/28/15
Thank you for getting back to me. I will attempt to catch the tang, however, I will probably wind up having to rearrange the rocks as there are many caves and arches I have made ( the flame angel loves to zip in and out) What would the consequences be if I am unsuccessful in removing this algae?
It doesn't appear to bother the tang as I have not observed it flashing or rubbing on the rocks. Could this be the result of a piece of algae getting caught in the barb when I cleaned the tank?
There was quite a bit of it due to no cleaning for almost a month. As always, I greatly appreciate your help.
Kellie Kyser
<Ahh, either way, not likely the algae is doing the fish any harm. Cheers, BobF>

Re: Growth on tang barb       7/1/15
Hello! I am happy to report that the algae has been dislodged from the tang barb..probably due to the clowns chasing it away from their nest area
(female clown laid eggs..again) Thanks again for answering all of my questions.
Kellie Kyser
<Thank you for this follow-up Kel. Bob Fenner>

Yellow tang problem. Poor grammar, no reading   10/15/14
Hiya im hoping that u can help with a problem i have,my main tank was infected with marine ich and some of the fish were showing signs so i put them in a hospital tank and conducted hypo treatment for 6wks.
<Not a fan. Rarely works in the long term>
they have now been in normal s.g for the past two wks and all was fine except the last couple of days my yellow tang has rapid breathing and now a slight orange patch near her tail,she is still eating,i dont see any spots on her or any of the fish,your help would be much appriceated as im not sure what to do next,
<Search, read on WWM re these issues>
<Likely the Hypo destroyed too many hemocytes... only time and good care will show if this fish survives, the others remain Crypt free. Bob Fenner>
re: Yellow tang problem   10/15/14
Thank you for your quick response.would you reccomend a fw dip?or should i place her back into the dt and see if that helps?Again thank you for your
<I'd skip the dip and any further med. use, and place the fish back in the main/display. BobF>
thank you emma

Yellow tang. Hlth., no data      9/1/14
I have a yellow tang that seems to act health but has a few small red dots on his dorsal fin ( see below ). Any ideas what this could be and the cause.
<Mmm; well... could use data... re the system, water quality test results, foods/feeding, tankmates.... the frayed dorsal fin and white chest patch... might indicate some issue/s with the system; perhaps bullying, lack of nutrition. Let's just have you read:
and the linked files above. Bob Fenner>

Re: Yellow tang.     9/1/14
Bob thanks for such a quick reply. You guys are do great.
So about the lack of info:
My tank is: 72gal sump 20gal 1/2 filled , PH 8.2, SG 1.24-1.25, Ammonia 0, Nitrite 0, Nitrate 20, temp. 80degF , 29 ponds of live rock, 3 blue legged hermits, 6 Snail , 3 clown , 1 green goby, 1 yellow tail damsel, 1 yellow tang. Loss 1 coral beauty one month ago and loss 1 rainbow rasp 2 month ago. Got tank in April 2014. Been fighting the nitrate at 20 for a few months so feeding once a day, Fish finish eating in about 5 mins.
<Do see WWM re Yellow Tang feeding... this fish is thin; malnourishment, lack of nourishment may be the real problem here>
Please let me know what other info would be helpful.
Thanks for all your help and knowledge.
<Glad to share. BobF>

Zebrasoma Flavescens in quarantine      6/11/14
Hello again Mr. F.
<Mr. A>
A quick question: I have 2 Zebrasoma flavescens in quarantine for well over 2 weeks now and they looked very good since day one, absolutely no white spots on them, are eating very good , they actually got fat , I fed them a lot and they have live rock covered with algae in there and they always graze around. There is no flashing, but the only problem is that from the beginning they seem to breath very rapidly. At first I thought they were scared
<A week is more than long enough with most all Surgeons; esp. Zebrasoma spp.... And yes to being stressed in quarantine settings; much more to be lost in delaying... move them>
and adapting but they still do it, even if they come and eat while I am there so they are no longer afraid.
I know ( too well unfortunately ) that this could be a sign of Cryptocaryon or even worse Amylodium but is the only sign and as I told they are eating and grazing all day.
<Highly doubtful>
When could I introduce them to the DT? Do you think there is reason to worry? Anyway I always dip in freshwater and blue Methylene before introduction to the DT, but I have in there very valuable and sensitive fishes and I don`t know what to do.
Thank you,
Andrei from Romania
<I would move these and all fishes through the proscribed pH adjusted freshwater bath (likely w/ formalin) enroute... and do this NOW. Bob Fenner>

Yellow tang and gastrointestinal parasites     5/13/14
Hello Wet Web Media crew,
I've been having some problems with my Yellow tang. I've had him for two years but in the last 6 weeks he has not been well. It started with him losing his appetite and staying in one spot in the tank which is a 125 gallon reef. I started noticing that when i fed the fish at night and gave the tang his Nori he was barely eating. There were no visible signs of any parasites. I did see that his feces was <were> white and stringy looking.
After doing some research I figured that he probably has some sort of gastrointestinal parasites.
<Maybe; but this does not necessarily follow given the stated symptoms...
I.e., could be due to nutritional, psychological issues>
He was treated in a quarantine tank for 10 days with 250 mg of Metronidazole per day with 50 % water change daily. Gradually he started eating again and he was put back in the DT. Its been about 3 weeks now, and he is beginning to look very skinny and sunken in and he isn't eating much again. I'm not really sure how to proceed with treating this fish. Any advice would be much appreciated.
Thank you
<I'd be offering a wide range of foods; with frequent to (as with algae) constant offering. See WWM re Z. flavescens foods/feeding/nutrition (FAQs).
Bob Fenner>

yellow tang black spots/quarantine question... Paravortex?       4/8/14
I bought a yellow tang a week ago. It had black spots on its entire body that weren't visible at a fish store.
<Ahh, likely the not-so-problematical Turbellarian...>
The tang had been fresh water dipped upon arriving home, put in quarantine and treated with PraziPro, and CopperSafe for 5 days. It's now free of visible diseases and the tang has been eating fine. When would it be safe to put the yellow tang in my display tank? Would another round of PraziPro and/or CopperSafe be beneficial, or should it be observed for another couple of days without medication before going in the display tank? Thank you!
<Mmm, read here: http://wetwebmedia.com/paravortexfaqs.htm
... likely just a pH adjusted dip enroute... Bob Fenner>
Re: yellow tang black spots/quarantine question
... Doing your own Quarantine      4/8/14
Thank you very much for your reply. Another quick question: if a fish store has had a white cheek tang for 5 months can a quarantine process be foregone and place the fish directly into a fish tank? This is for another (75 gallon) tank and won't be mixed with the yellow tang. Thank you!
<See the Quarantine sections on WWM. BobF>

Yellow Tang missing its eyes 11/12/12
Hello WWM,
<Hi Danny>
I added a five inch Stars and Stripes puffer and a four inch Yellow Tang to my 180 gallon aquarium yesterday. This morning either the new puffer or a large Lunare Wrasse attacked the Yellow Tang and ate both of its eyes.
Needless to say it was very disturbing.
The tang did not suffer any other damage, but is now completely blind, laying on its side, and breathing rapidly. I can move the tang to my QT system where it would live by itself (meaning it would not have to compete for food). Can the tang find food and survive in this condition or should I euthanize it?
<Will have a problem locating food and eating it.  Best to euthanize this fish ASAP, would not let it suffer.>
<You're welcome.  James (Salty Dog)>

Septicemia on my yellow tangs     7/24/12
Sorry for bothering you, since I know you are so busy maintaining such an excellent database of marine aquarium knowledge, but I seem to be having quite a problem with my saltwater tank. A while back I asked a question regarding my ocellaris clownfish and my Koran angelfish. Unfortunately, while I had them in quarantine, we lost power for a few days. The only survivors were the ocellaris clownfish pair. Since then, my tank has been doing quite well, and I've added some fish (after a lengthy 6 week quarantine, in which everything received 2 doses of Prazi-pro at full strength as well as Cupramine at half strength). The problem is that just recently (after being in the display over 2 months) both
<Two; my emphasis here>
of my yellow tangs began to show red blotches on their bodies (one much worse than the other).
At first it was only in the dorsal fins, but now it has spread to the caudal peduncle of the slightly smaller specimen (who is boss over all the tangs in the tank). My tank is a 187 gallon (60"x24"x30") which I hope to be converting into a reef. Here are my levels:
pH: 8.3
Salinity: 1.025
Ammonia: undetectable
Nitrite: Undetectable
Nitrate: between 0 and 5 (working on lowering this)
Phosphate: 0.005 (working on lowering this as well)
<Not to worry; this is low enough>
I run a G200 protein skimmer (which I skim more on the wet side), as well as having a 55 gallon refugium, and performing weekly 20% water changes.
Current fish include:
2 Yellow Tangs (which have gotten along great since I got them, even sleeping in the same cave at night)
<As far as you've seen>

1 Sailfin Tang (who schools with the yellows during the day)
1 Bariene Tang (who is the smallest tang currently, but growing fast)
1 High Hat Drum (love this fish; he's hardy, is growing fast, eats everything, and cleans the sandbed)
1 Papuan Toby (who hasn't nipped any fins yet, got him for free from a friend)
1 Melanurus Wrasse (A fully grown male, quite spectacular)
1 Bluehead Wrasse (awesome fish, but destroyed the hermit crabs)
1 Arc Eye Hawkfish (same as above)
1 Sleeper Banded Goby (Amblygobius phalaena) (he keeps my sand perfect and made a burrow right up front in the tank)
2 Ocellaris clowns (a breeding pair)
1 Blue devil damsel (who is the smallest fish in the tank)
2 Yellow tailed blue damsels (who paired off pretty early on)
The fish are fed 2 times a day (Mysid shrimp, and marine cuisine in the morning; Nori and Prime reef at night). All fish (including the two yellow tangs) act normal and eat greedily (all of them have the fish equivalent of a beer gut). I just can't figure out why the red won't go away on the yellow tangs.
<"Something/s stressful"... not likely water quality given the readings you present, the gear you have, the other livestock kept... more likely "something" in the cave they share (e.g. Bristleworm) or themselves interacting... I'd separate the two, only keep one in this system>
Occasionally it seems to be getting better, only to look worse the next time I look at them. I am currently performing a 20% water change, and I will be grabbing some Maracyn 2 in the morning (in case the tangs get worse and I need to move them to quarantine to treat them). Do you have any other suggestions for me? Are there any medicines that would work better than Maracyn 2?
<No medicine/s called for, advised>

Thanks in advance and keep up the good work,
<For review, please peruse the Z. flavescens hlth/dis. FAQs:
and the linked files above. Bob Fenner>
Re: Septicemia on my yellow tangs     7/24/12

Dear Bob,
Thank you for answering my question, but I'm still stumped. The 2 yellow tangs show no aggression at all between them, and had lived together in a 75 gallon for about 3 years before I bought them. I actually teach piano and the tank is next to the piano, so I am able to watch them for most of the day and never see aggression.
<Might not be aggression per se, but just stressful to be in company... in the wild this species lives individually or in dozens to a hundred or so individuals in a moving shoal>
 If I do notice aggression I can move all the cichlids out of their 180 gallon tank and turn it into a tang/trigger/puffer/grouper FOWLR. As for the 2 yellow tangs being bothered by a Bristleworm, I do not think that is the case. Right before I added the two yellow tangs to the display I came downstairs at 1:00 in the morning to discover my seagrass filefish (Acreichthys tomentosus) being devoured by a 2 foot worm.
I ended up dismantling the entire display and found the worm hiding in my sandbed. Upon searching Google I found out exactly what it was: a bobbit worm. I was paranoid about having any others like it in my system and I treated the display with Cupramine. Could the septicemia be the result of copper leaching from my live rock?
<Yes; could be a factor>
 I know tangs do not like long term exposure to copper. If there is residual copper should I just continue to run the skimmer, bump water changes to twice weekly, and add a Polyfilter pad (the ones designed to absorb copper and other chemicals)?
I could also run some activated carbon. I ended up buying some Triple Sulfa at the LFS this morning, because they recommended it over the Maracyn 2.
<Please don't apply this... Of no use, and may foul up the bio-make up microbially and hence to all>
 If the tangs get worse (they look somewhat better after last night's water change), should I put them in quarantine (divided from each other since the quarantine is a 30 gallon) and treat them?
<No to treatment>
By the way, I spent about 4 hours going through every FAQ page on WWM about yellow tangs. It was quite the interesting read.
<Ah yes... one of the top dozen or so marine species in terms of popularity>
On a somewhat unrelated note, hopefully in about a month I will be moving this tank to a different part of the house and building it into the wall.
In the process I will be upgrading to a 125 gallon refugium behind the wall with much better access than the 55 gallon refugium under the tank.
<I'd bet you're looking forward to this change and that it will improve all's experience.>
Thanks again,
<Welcome, and thank you for this follow-up. Bob Fenner>
Re: Septicemia on my yellow tangs    7/28/12

Dear Bob,
I'm sorry to bug you, but things are getting worse for my tank.
<I see this in your tank... and more... in your pix. A very likely source of the trouble; the "something toxic" in your system>
 I just added 2 more powerheads to the tank for increased circulation (which made all the fish much more active), as well as taking the lights off all of my freshwater tanks and putting them over this tank (which also made the fish more active and much brighter colored). All my water readings are exactly the same as they were in the first email, but the two yellow tangs still have septicemia (although they are slightly better than before). I added Cuprisorb to the tank, and it has had absolutely no color change, so I guess I have no copper left in the system. I also added 25 Astraea snails and they seem to be thriving (as long as they stay tight to the wall during the day, the puffer and the wrasses like harassing them).
However last night my high hat drum died for no apparent reason, although he seemed rather listless last night (just kind of floating around instead of his normal behavior of swimming back and forth begging for food when I'm by the tank). That was a real disappointment to me as he was one of my favorite fish, and he was thriving and eating like a champ mere hours beforehand. My Bariene tang also seems to be having a problem.
When I first purchased him, I had him in quarantine and he came down with Ich within 48 hours. I proceeded to treat him with Cupramine for the remainder of his time in quarantine (6 weeks), and he quickly recovered (no symptoms after the first week of treatment). However, he did glance at the decorations in quarantine and he gave himself a small circular wound (which I thought was just a bruise). Today, it seems that it wasn't just a bruise.
It is a perfect circle on his body, about a half inch across. It is lighter in color than the rest of his body, and has something white hanging out of it. All of the other fish seem fine, but I really am sick of having my fish die on me, and I've gone through over 90 dollars of salt in the past 2 weeks...
I've taken the liberty of attaching some pictures.
Thanks again,
Ashton Nietzke
<The mauve red on your rock... looks to be BGA, Cyanobacteria... is poisoning your fishes. Please read here re: http://www.wetwebmedia.com/bluegralgae.htm
and the linked files above... You need to react, soon... and I might even go ahead and use the antibiotic route of chemical control here (it's that much of an emergency)... in the long/er haul, doing what you can/will to promote other algal types...
Bob Fenner>


Re: Septicemia on my yellow tangs    7/28/12
Dear Bob,
I guess I will go ahead and treat the tank with Chemiclean then
<Or any source of Erythromycin... WITH your close observations... ready to change water and more... should the system disimprove quickly from the BGA crashing>
 (I just happen to have an almost brand new bottle a friend gave me when he gave up on saltwater). Is there anything else I can do?
<... move out the LR, or move the fishes elsewhere>
When I treated the display with Cupramine, all of my Chaetomorpha in the refugium died. I tried to go buy some mixed macro (Chaeto, Gracilaria and Caulerpa) yesterday, but both of the nearby stores were out of all types of macroalgae. I used to grow C. prolifera in the display but it was at the point where my tank looked like a seagrass bed (which the filefish loved).
<MUCH better than the BGA>
I took it out because I read about all the instances of Caulerpa going "sexual" and poisoning tanks online. The Astraea snails seem to like eating it though, should I try adding some more snails?
<I wouldn't, no... you have too many already as far as I'm concerned. See WWM re scavengers as such>
As for the Bariene tang, do you think it is just an injury healing itself (he seems to be scraping it on the bottom and the rocks), or is it a parasite or disease of some sort.
Thanks again,
Ashton Nietzke
<Welcome. Bob Fenner>
Re: Septicemia on my yellow tangs   7/30/12

Dear Bob,
I thought I'd give you an update, no matter how unpleasant it may be. The erythromycin ended up making the algae grow much faster than before rather than killing it.
It now covers the bottom of the tank and all the sides. I think it is actually a Dinoflagellate and not Cyanobacteria.
<Do you have a microscope? Take a look at a sample... easily distinguished>
I ended up getting a ball of Caulerpa racemosa and Caulerpa taxifolia, and that is currently in my refugium.
 When I went to the LFS to get the Caulerpa, I told them what was wrong with the tank and they ended up selling me 2 sea urchins, a Halloween urchin and a red spined blue tuxedo urchin (both of whom love Nori). They, along with the 25 snails I already had, seem to be eating the Dinoflagellates, but after reading about Dinoflagellates poisoning the animals that eat them, I feel as if I should remove all the animals and put them in a different system, and turning off all of the lights on the display for a few weeks. I am pretty sure that I will divide the animals between my 30 gallon quarantine (I feel as if the Zebrasoma will pick on the smaller bariene in the 75 gallon) and my 75 gallon tank that currently has fancy goldfish in it (I will move the goldfish to a kiddy-pool, change out all the freshwater for saltwater, and add some bio-Spira for saltwater).
All of the invertebrates will go into the 75 gallon, since the larger water volume should hopefully be more stable, and that tank hasn't been treated with copper.
By the way, the bariene tang (which grazes this algae stuff more than the others) looks the worst, and continues to get worse. The yellow tangs, both of which eat it occasionally have septicemia still (and one is worse than the other). The sailfin tang (which doesn't touch it at all), seems to be having no problem, much like all of the other fish (which do not eat it either). I plan on running over to the store in the morning and buying a 200 gallon box of instant ocean salt.
 Is there anything else I can do?
<I'd add a great deal more small substrate to the refugium and/or main/display tank, AND look into what your RedOx is... raise it w/ ozone addition. This is, as the saying goes, WAR>
Thanks again for putting up with all my emails,
Ashton Nietzke
<Welcome. BobF>

Re: Septicemia on my yellow tangs     8/2/12
Dear Bob,
I thought I'd give you a follow up on the algae problem. Two nights ago I removed all of the animals in the tank and moved them into quarantine.
Unfortunately, the bariene tang died that night. As for the other fish, all of them seem 100% better, including the two yellow tangs which have no more red on them at all.
<Ahh, good>

The tank is currently sitting in the dark with the lights off and is covered with a black tarp. I also raised the pH to 8.5 and began running a pound of activated carbon in the sump based on recommendations from the LFS and others online who have dealt with Dinoflagellate problems. I will say that after moving the fish, snails, and urchins (and having my arms in the water for quite some time afterwards scrubbing the walls and rocks) that I got quite the headache and felt quite sick to my stomach.
<Mmm, me no like>

Luckily, the queasy feeling and the headache have just about gone away now.
Needless to say, I will be investing in a pair of arm length rubber gloves after this incident.
Thanks for putting up with my emails,
Ashton Nietzke
<Thanks for this update. B>

Surgeonfishes: Tangs for  Marine Aquariums
Diversity, Selection & Care

New eBook on Amazon: Available here
New Print Book on Create Space: Available here

by Robert (Bob) Fenner
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